DUBOIS Quenching Fluids - Maintenance and Monitoring Guide

QUENCHING FLUIDS Maintenance and Monitoring Guide

ABOUT DUBOIS manufacturing, metal working, heat treating, food and beverage,

DUBOIS | CIMCOOL TECHNICAL SUPPORT & LABORATORY CAPABILITIES

pulp and paper and water treatment industries for over 100 years.

Customers need to know their quenchants are working optimally

The DuBois Quenching product line will now be available in

to ensure achieving success with their heat treat applications.

Europe via the CIMCOOL organisation. The powerful combina-

DuBois | CIMCOOL provides professional technical expertise,

tion of DuBois’ 100 years of experience and Cimcool’s 70 years of

rapid test results and practical heat treating knowledge. We

European market knowledge, are now where chemistry & process

offer quench curve testing with cooling rates according to ISO

knowledge meet through leading heat treatment products.

9950, ASTM D6200 & D6482. Additional physical property testing

In this strong partnership, Cimcool has engineered the DuBois

consists of: Flash point, Water content, Insoluble matter, Viscosity

portfolio to the latest European legislative requirements and to

and Oxidation level.

In 2020 the Cimcool organisation was acquired by DuBois Chemicals, a leading supplier of specialty chemistry to the

next level quenching performance resulting in improved corrosion protection, longer fluid life, and optimal health and safety features.

In Europe and beyond, Cimcool will calculate your reduced operating cost and efficiency, commit to your sustainability goals where possible and nurture your safety and efficiency processes.

The European DuBois Quenching fluids product line includes oil and water-based Quenchants.

PRODUCTION AND DISTRIBUTION Cimcool are a worldwide lubricant manufacturer headquartered in 3 main regions: Europe, Americas and Asia. We supply directly in 9 European countries and in a further 34 countries through distributors. Our state of the art European production facility is based in Vlaardingen, the Netherlands near the major industrial city of Rotterdam. This is the industrial heart of Europe and a central hub of chemical production. We are fully certified to ISO ISO9001 & ISO14001 standards so you are guaranteed a quality product produced in an environmentally responsible way.

RESEARCH AND DEVELOPMENT Cimcool prides itself on our in house development team of highly skilled Chemists who constantly strive to make innovative solutions to your production needs. These products meet all current and future legislative and health and safety requirements as well as facing the challenge posed by modern production processes.

2

DUBOIS QUENCHING PRODUCTS

DUBOIS OIL BASED QUENCHANTS

DUBOIS WATER BASED QUENCHANTS

DuBois oil based quenchants are ideal products for quenching

While minimising part distortion or breakage, water-based

intricate shaped parts and high-hardenability alloys. They will

quenchants provide high hardness with fast quenching speed.

improve your process by:

Water-based fluids are:

• Easy cleaning for brighter work

• Non-flammable

• Exceptional oxidation-resistance and thermal stability to

• Easy to clean off compared to oil

maximise bath life • Less drag-out to minimise usage and cost

• Dilutable; lowering usage cost • Improving workplace environment

• Maximum quench control for predictable performance and consistent high quality parts

3

DUBOIS OIL BASED QUENCHANTS TEST PROCEDURES FOR QUENCHING OILS:

FLASHPOINT (AND FIREPOINT)

• Appearance and odour

CLEVELAND OPEN-CUP TESTER

• Kinematic viscosity at 40 C (ASTM D445) by capillary device

Method following ASTM D92

• Water content by Karl Fischer (ASTM D6304)

Flashpoint COC is defined as the lowest temperature at which

• Flashpoint - Cleveland open cup (ASTM D92)

a small test flame passing over the surface of the liquid causes

• Sediment vol% (ASTM D96) by centrifuge

the vapor to ignite. Fire point is considered to have been reached

• Oxidation Level (DIN 51453) by FTIR

when the application of the test flame produces at least five

• Cooling curve (ASTM D6200) by IVF smart Quench II

continuous seconds of ignition

0

• Difference maximum cooling rate between sample and reference (ASTM D6200) • Temperature of the maximum cooling rate (ASTM D6200) KINEMATIC VISCOSITY

Method following ASTM D445 Using a capillary viscosity measuring device (Ubbelohde, Cannon-Fenske) viscosity of a given fluid is measured at 40°C. Viscosity is determined by measuring the time in seconds, required for a fixed volume of fluid to flow a known distance by VOL% SEDIMENT BY CENTRIFUGE

gravity through a capillary at controlled temperature.

Method following ASTM D96.

WATER CONTENT BY KARL FISCHER

Sediment in the quenching oil or fluid can be removed by centrifu-

Method following ASTM D6304

gation (1800 rpm for 30 minutes). By using special pear shaped

Titration method to determine very accurately the water content in

centrifuge tubes the volume of sediment is determined in 100 ml

quenching oils. Maximum water content in quenching oils: 0.1%

oil/fluid. Typically vol% sediment should be kept below 0.5%

4

OXIDATION LEVEL USING FTIR

QUENCHING CURVE

Method follows DIN 51453

Method following ASTM D6200 From the data generated by the IVF smart quench II equipment 2 important parameters can be read: • Temperature of the maximum cooling rate • Maximum Cooling rate difference between sample and a reference.

AAA-DA QUENCH OIL Test Reference File Name Operator Time of Test Date of Test Type of Test Test Condition Agitation Flowrate Probe Number Test Start Temp Media Temp

Product Name Manufacturer Formulation Batch Number Type of Media Comments

JMD 09:46:49 Thu 28-Jan-2021 Media Static

AAA-DA

Oil

SQ3282 871 °C 60 °C

Spectrum Marquench Oil M. °C 1000

This FTIR method determines the level of oxidation by a response

0

20

40

60

Cooling Rate °C/sec 80

100

120

140

900 850 800

at 1710 cm-1. IR energy is absorbed due to the carbon oxygen bonds in the oxidized oil.

700

A method in the FTIR software does the calculation

600

Reporting levels:

500

None < 0.15

400

Slight 0.15 – 1

300 200

Moderate 1 – 2

100

Severe > 2

0

0

10

Maximum Cooling Rate Temp at Maximum Cooling Rate Temp at Start of Boiling Phase Time at Start of Boiling Phase Temp at End of Boiling Phase Time at End of Boiling Phase Temp Diff between Start & End Cooling Rate at 300 °C Cooling Rate at Cooling Rate at Time to reach 600 °C Time to reach 400 °C Time to reach 200 °C Time from to

20

30 Time Secs

Value 98.10 646.13 738.63 5.500 446.63 10.375 292.01 5.58

°C/sec °C °C secs °C secs °C °C/sec

7.375 12.375 49.500

secs secs secs

40

50

SR-1

AMS 2759 – Heat treatment of steel parts general requirements specifies: If no alternative limits have been established by pre-production tests exceeding the following limits compared to the initial shipment of quenchant shall be cause for corrective action: For mineral oil based quenching oils: • Temperature of the Maximum Cooling Rate: ±37.8°C (±68°C) • Maximum Cooling Rate: ±13.9°C/s (±25°F/s)

5

60

RECOMMENDATIONS FOR PROLONGING OPERATING LIFE AND OPTIMISING PERFORMANCE OF QUENCH OILS: • Keep operating temperature below the maximum recommended operating temperature shown on the Product Data Sheet.

Manage load size during quenching to prevent temperature from rising by more than 22oC. Avoid accidental overheating by installing high temperature cut-off or alarm.

• Any electrical immersion heaters used to raise the temperature of the oil should not exceed 15,500 watts/m2 in a well agitated environment.

• Maintain an oxygen-free atmosphere over the quench tank whenever the temperature is above 100oC to minimise thermal degradation and oxidation. Endothermic gas, nitrogen or anSTARTING UP AN OIL QUENCH BATH AFTER SHUTDOWN

other inert atmosphere works well.

• Keep the oil agitated at a flow rate of 15 – 30 m/min. Variable speed, propeller type agitators are preferred. Do not bubble air

The additives in Dubois Chemicals quench oils will not separate

through the quenchant.

out or lose effectiveness during an extended shut down. How-

• Avoid using quench oil cooling systems containing copper,

ever, there are a few recommendations to follow that will help

brass or aluminum and their alloys.

ensure good quenching performance upon start-up:

• Prevent hydraulic fluids or other oils from leaking into quench tank.

1. Install new filters prior to starting up the quenchant circulation

• Prevent any water from entering quench tank. Do not have

system. Ensure the pump screens are clean.

water sprinkler systems installed over the quench tank. If any

2. Confirm there is proper oil flow through heat exchangers and

water contamination is ever suspected, carefully heat the oil

cooling equipment.

to 105 C with agitation. The oil should be dehydrated until the

3. If there was the potential for any water getting into the quench

o

water content is below 0.1%.

oil, it can be removed by carefully heating the oil to 105°C with

• In case of fire, use CO2 or dry chemical to extinguish. Do not

agitation and holding for 3-4 hours.

remove loads while still hot to minimise the risk of fire.

4. Bring the oil to the target operating temperature prior to

• If reclaiming oil from rinse water, have the oil thoroughly tested

quenching the first load.

before adding back into the quench tank.

5. Quench speed and overall oil condition can be confirmed by

• Replenish drag out losses with the current Dubois Chemicals

sending a 3x1L sample to Cimcool in Vlaardingen.

quench only. Do not mix in other types of oils. Also, do not add a Dubois Chemicals quench oil to tanks containing other oils without the Dubois Chemicals laboratory testing first for compatibility.

• Keep sediment level < 0.5%. Centrifuges or filters are recommended to control sediment level.

• The Cimcool laboratory in Vlaardingen can evaluate quarterly quench oil samples for quench speed, viscosity, flash point, water level, sediment level and oxidation. The test results will be used to make recommendations for maintaining optimal quenching performance.

6

DUBOIS POLYMER BASED QUENCHANTS TEST PROCEDURES FOR WATERBASED POLYMER

Solution: The optimal starting water hardness of DuBois polymer

QUENCHANTS

based quenchants is between 0- 20dH (35fH). Starting water hardness can be checked using hardness strips

• pH (ASTM E70) • Kinematic viscosity at 400C (ASTM D445) by capillary device • Concentration based on viscosity • Refractometer reading • Concentration based on refractometer reading • Updated refractometer factor • Sediment vol % (ASTM D96) by centrifuge • Microbiological contamination (dipslide) • Cooling curve (ASTM D6549) by IVF Smart Quench II

METHOD

• Difference maximum cooling rate sample and reference

Immerse all reaction zones of the test strip in the sample (15 -

(ASTM D6549)

300C) for 1 sec (not in running water). Shake off excess liquid

• Temperature of the maximum cooling rate (ASTM D6549)

from the strip and after 1 min. Determine with which colour row

• Nitrite (Strips)

on the table the colours of the reaction zones coincide most exactly. Read off the corresponding result. Water softening could

WHY MAINTAIN POLYMER BASED QUENCHANTS?

be an option where water hardness is very high or variable. Water

If maintained correctly then DuBois Quenching Fluids will give

makes up for between 70-95% of the quenching fluid mix and this

excellent performance and a long service life. However, neglec-

water evaporates constantly, leaving behind the impurities. In this

ting fluid maintenance will increase the chance of spoilage,

way the water hardness continually increases and is a reason

higher usage, extra waste and potential health and safety issues.

why scheduled cleanouts at set intervals are required to prevent

Frequent monitoring is essential to ensure performance and

the level getting too high.

quality of the fluid is maintained. Following a few simple rules will CONCENTRATION

help ensure you keep the fluid in top condition.

Fluid concentration is the most important parameter to control FACTORS AFFECTING QUENCH FLUID CONDITION:

when monitoring a waterbased quenching fluid. Maintaining the correct concentration level will help to ensure a long fluid life,

WATER QUALITY

good performance and corrosion control and help to minimise costs. Concentration should be checked regularly, preferably daily, and before and after each top up. Measuring the concentration of a fluid in the field is easily achieved by the use of a handheld refractometer or by measuring the kinematic viscosity.

All water contains an amount of naturally occurring water hardness and chloride. Low water hardness may contribute to foaming, while high hardness levels may cause issues with mixing, stability and corrosion.

7

USING A REFRACTOMETER

USING KINEMATIC VISCOSITY Measuring the kinematic viscosity at 25°C is a more reliable/accurate method determining the concentration using the conversion table mentioned in the PIF. By using this method also an adjusted refractometer factor can be calculated: Adjusted refractometer factor: Concentration using kinematic viscosity / refractometer reading

Cleaning: Use a dry clean soft cloth to ensure that the glass and flap surfaces are clean Zeroing: Cover the face of the refractometer with water, close the flap, look through the eye piece pointing the unit at a good light source and zero the unit using the zero screw. Ensure the water and refractometer are at room temperature. Reading: Apply the quenching fluid to the face and take the reading off the %Brix scale. Calculation: Multiply the refractometer reading by the (adjusted) factor for the product, to give the concentration of the coolant.

14,00

12,00

(1)

(2)

(3)

(4)

Kinematic viscosity @ 25°C in mm2/s

10,00

(5)

8,00

6,00

4,00

1. View through the refractometer with no liquid present

2,00

2. Image visible when refractometer is zeroed with water

0,00

3. Typical view when measuring a fresh mix

0

5

10

15 Concentration %(v/v)

20

25

4. When a fluid ages the reading becomes less distinct 5. Eventually when a fluid ages and water hardness and tramp

PH

oil increase it may not be possible to get a clear reading.

The pH scale measures the alkalinity or acidity of a solution.

Water based quenching fluids have a pH in the range of 9.0-9.5

Tips

when fresh. Having a pH lower than the recommended level for

Always take the coolant sample from a clean area of the tank

your fluid most likely indicates bacterial contamination, although

to avoid tramp oil. The refractometer factor for the product can

sometimes it can also indicate extremely low strength. A higher

be found on the product information flyer (PIF). Use a good light

pH than recommended is unusual but can indicate a very high

source to make the reading clearer. Rotating the refractometer by

strength or contamination.

90° along its length may give a clearer reading. Allowing the fluid to settle on the refractometer glass for a few minutes may also

Tips

give a clearer reading.

Always take the sample from a clean area of the tank to avoid tramp oil.

We recommend against using electronic pH meters. The type normally sold are of poor quality, fragile, require careful cleaning and calibration and give poor results

8

30

VOL % SEDIMENT

USING DIP SLIDES

Smaller particles can promote corrosion, cause skin irritations and inconsistent hardening. Determination method: see page 4.

Solution: Remove all sediment/ contamination from the system on a regular basis. Filter the fluid to prevent a build-up of small metal particles.

NITRITE Remove the slide from the holder and dip into the fluid for a few seconds – ensuring no contact with tramp oil. Remove from fluid and carefully insert the slide back into the holder. Incubate the slides following the manufacturers recommendations – usually 48 hours at 30°C for bacteria and 72 hours for mould. Record the results by comparing the slides with the manufacturers visual guide.

The reason for testing nitrites is that they can react with secondary amines to form nitrosamines, which are Carcinogenic Cat 2.

Cimcool does not use (sodium) nitrite in our quenching fluids, but the mixing water is a possible other source. The Merck Nitrite test (Merckoquant 1.10007, see photo) is a simple, easy method for

Tips

quickly checking the nitrite content in a quenching fluid.

Store dip slides in a cool dark place and use before the manufac-

Instructions for use:

turers recommended expiry date. Ensure you incubate your slides

1. Immerse the reaction zone of the analytical test strip in the

at the correct temperature and for the correct length of time as

solution to be tested for 1 sec.

recommended by the manufacturer.

2. Shake off excess liquid from the strip.

3. Wait 15 sec., compare the reaction zone with the colour scale on the package, and read off the result Immediately seal the tube after removal of the required test strips.

Control Level

Bacterial content Action

Good control

≤ 103 cfu/ml

No further action

Reasonable

10 -10 cfu/ml.

You may need to clean the

4

5

system, or change your biocide regime. Get advice.

MICROBIOLOGICAL CONTAMINATION (B - M - Y)

Poor control

Bacteria and mould are naturally present in the environment and

≥ 106 cfu/ml

have a large impact on fluid life and component quality. Bacteria quickly degrade a fluid, reducing the pH, causing poor odours, increasing the chance of ferrous corrosion on parts and equipment. Mould causes blockages to occur in fluid delivery lines and filtration systems.

Solution: While it is not possible to prevent micro-organisms from entering a fluid system we can control their growth by making sure that we create a hostile environment. Correctly cleaning out a system prior to filling will ensure the best possible start by eliminating as much of the contamination as possible. Maintaining the correct fluid concentration is vital to ensure the quenching fluid has the ability to prevent growth of the microbes. Keeping the fluid clean by removing tramp oil and build-up of sediment will also aid in preventing contamination.

Monitoring microbiological contaminationin the quenching fluid is easily measured by using dip slides and an incubator.

9

Act immediately.

COOLING CURVE

RECORDING OF RESULTS

Method following ASTM D6549

It is best to record them in way to show the trends of each system

From the data generated by the IVF smart quench II equipment 2

over time. Cimcool/DuBois can provide to show a summary on

important parameters can be read:

each system and spreadsheets for recording all of the results. We

• Temperature of the maximum cooling rate

can even tailor the spread sheet for you own requirements.

• Maximum Cooling rate difference between sample and a reference.

Monitoring Chart Polymer Based Quenchants System name:

10.0, 15.0 and 20.0% ENVIROQUENCH AT 32 C 900 850 800

0

50

100

Cooling Rate °C/sec 150 200

Refractometer factor:

Advised Concentration Range:

System capacity:

Advised System temp.

Date Initials

250

300 Concentration %

°C

Product:

700 600 500

9.6 9.3

pH

400

9.0 8.7

300 Bath temp.

8.4

200

0

0

10

20

30 Time Secs

40

50

Comments

100 60

FLUID TECHNOLOGY

Test Reference File Name Operator Time of Test Date of Test Type of Test Test Condition Agitation Flowrate Probe Number Test Start Temp Media Temp

10.0% EQ - 16GK03 EQ-156 JMD 11:46:49 Tue 2-Feb-2021 Media Agitated 1000 RPM SQ3283 850 °C 32 °C

15.0% EQ - 16GK03 EQ-161 JMD 14:47:22 Tue 2-Feb-2021 Media Agitated 1000 RPM SQ3283 850 °C 32 °C

20.0% EQ - 16GK03 EQ-166 JMD 09:44:07 Wed 3-Feb-2021 Media Agitated 1000 RPM SQ3283 850 °C 32 °C

Product Name Manufacturer Formulation Batch Number Type of Media

ENVIROQUENCH

ENVIROQUENCH

ENVIROQUENCH

Polymer

Polymer

Polymer

Maximum Cooling Rate Temp at Maximum Cooling Rate Temp at Start of Boiling Phase Time at Start of Boiling Phase Temp at End of Boiling Phase Time at End of Boiling Phase Temp Diff between Start & End Cooling Rate at 300 °C Cooling Rate at Cooling Rate at Time to reach 600 °C Time to reach 400 °C Time to reach 200 °C Time from to

128.46 °C/sec 679.39 °C 851.10 °C .000 secs 328.37 °C 6.375 secs 522.73 °C 60.45 °C/sec

112.49 °C/sec 633.05 °C 850.40 °C .000 secs 398.68 °C 6.000 secs 451.72 °C 47.86 °C/sec

114.92 °C/sec 725.00 °C 850.60 °C .000 secs 471.66 °C 5.500 secs 378.94 °C 46.55 °C/sec

3.250 secs 5.375 secs 9.125 secs

3.500 secs 5.875 secs 10.625 secs

3.625 secs 7.000 secs 12.250 secs

ADDITIVES Robust product formulations reduce the need for additive application to a minimum. In case needed the following additives are recommended and available:

CSR-1

• Cimplus 63 (~0.1%) Correcting low pH and restoring corrosion protection (provided concentration is OK) • Cimplus T4000 (0.1 – 0.2%), restoring ferrous corrosion protection (provided pH and concentration are OK) • Antifoam AF (0.01 – 0.05%) reduce foaming (preferred over Antifoam H due to better "dissolving")

AMS 2759 – Heat treatment of steel parts general requirements

• Biocides.

specifies:

CIT/MIT type f.e. Acticide 14 (0.005% – 0.02%)

If no alternative limits have been established by pre-production

BIT/MIT type f.e. Acticide MBS 5050 (0.1% - 0.2%)

tests exceeding the following limits compared to the initial shipment of quenchant shall be cause for corrective action: For polymer quenchants: • Maximum Cooling Rate: ±15% • Temperature of the Maximum Cooling Rate: ±15%

10

AQUEOUS POLYMER QUENCH BATH

STARTING UP A POLYMER QUENCH BATH AFTER SHUTDOWN

GENERAL RECOMMENDATIONS: The polymers used in the Dubois Chemicals polymer quenchant

Eliminate Bacteria, Fungus and Mould Before Starting Up

formulations have proven through years of use to be very durable in a wide range of heat treating applications. Inconsistent heat

Unchecked bacteria growth will reduce the pH of the quench

treat results are typically due to inadequate control of concentra-

solution. This can lead to corrosion of the quench equipment and

tion and temperature of the quenchant, external contamination

heat treated parts. Without biocides, bacteria/fungus/mould will

with other fluids (i.e., hydraulic oils, machining fluids, rust pre-

quickly grow and adversely affect polymer quenchant and part

ventatives, etc.), and high sediment levels. Although bacteria

quality can be compromised. Key notes to remember concerning

growth rarely impacts quench results, very high bacteria counts

biocide additives:

can lead to nuisance odours for workers. High levels of bacteria can also reduce the pH of the quench solution which can contrib-

Consult with your Cimcool Sales Representative to ensure that

ute to corrosion of equipment and parts.

biocide you are using is registered and compatible.

The following guidelines have been developed to extend the life of the quench bath and to provide consistent, high quality quench

• Stagnant unused baths due to shutdowns are prime targets for

results:

bacteria/fungus/mould growth because the biocides in the bath will be exhausted fighting off bacteria/fungus/mould growth due

1. In-plant concentration should be checked regularly by refrac-

to the lack of fresh polymer containing the biocides are not be-

tometer or viscosity. Frequency of evaluating concentration is

ing added to the bath on a regular basis

dependent on the production schedule and relative size of the

• Bacteria/fungus/mould contaminated baths will create very of-

tank.

fensive rancid odour your employees may be exposed too.

2. The quench tank should be operated at a consistent fluid level.

Large drops in fluid level due to water evaporation must be

Unsure About Your Bath?

avoided.

If you are unsure of your bath being contaminated with bacteria/

3. The temperature rise from the initial immersion of a load until

fungus/mould, its polymer concentration or quench rate and would

the end of the quench cycle should not exceed 10 oC.

like it tested before starting it up again for production purposes,

4. Agitation sufficient to provide a fluid velocity of at least 30

please follow these instructions:

metres/minute is recommended. This is especially important

1. Agitate the batch for 10 minutes

in the initial phases of quenching. Agitation must not be so

2. Turn bath off and collect a 3x1L sample

excessive it causes cavitation or produces foam on the surface

3. Send sample to Cimcool in Vlaardingen

of the tank.

5. Sediment level in the tank should be kept below 0.5% by volume. High sediment levels can contribute to spotty hardness and inconsistent quenching.

The specific filter micron size required is dependent on the nature and source of the sediment.

6. All Dubois Chemicals polymer quenchants contain a biocide. It is still possible for resistant bacteria to grow in the quench tank.

The potential for bacteria growth can be reduced by not allowing the quenchant to sit stagnant for long periods of time. It is better to occasionally or continuously circulate the quenchant.

Tank side biocides should only be used when recommended by the Cimcool Laboratory in Vlaardingen.

7. Regular replenishment with fresh polymer quenchant concentrate to replace quenchant carried out on parts will usually maintain the chemistry of the quench tank.

8. Occasionally, a polymer bath may become contaminated with an oil type product. This will slow down the cooling response of the polymer. If oil contamination occurs, let the tank settle without agitation. The oil should settle on the surface and can be removed by skimming.

11

FLUID TECHNOLOGY

Global Presence | Local Support EUROPEAN HEADQUARTERS

Distributors in other countries

Cimcool Industrial Products B.V.

For detailed distributor contact information for other countries

Schiedamsedijk 20, 3134 KK Vlaardingen, the Netherlands,

visit www.cimcool.com

Tel: +31 10 460 0660, cimcool.eu@duboischemicals.com www.cimcool.com | www.duboischemicals.com

Contact DuBois CIMCOOL Support in Europe CZECHIA

FRANCE

GERMANY

Phone: +420 56 75 89 061

Phone: +33(0)164 97 49 00

Phone: +49 211 54012733

Email: cimcool.cz@duboischemicals.com

Email: cimcool.fr@duboischemicals.com

Email: cimcool.de@duboischemicals.com

ITALY

POLAND

SLOVAKIA

Phone: +39 02 29 404 841

Phone: +48 12 357 54 00

Phone: +421 434 294 131

Email: cimcool.it@duboischemicals.com

Email: cimcool.pl@duboischemicals.com

Email: cimcool.sk@duboischemicals.com

SWEDEN

SWITZERLAND

UNITED KINGDOM

Phone: +46 8 920130

Phone: +41 52 343 68 21

Phone: +44 (0) 118 206 7020

Email: cimcool.se@duboischemicals.com

Email: cimcool.ch@duboischemicals.com

Email: cimcool.uk@duboischemicals.com

FLUID TECHNOLOGY