PAINTING SOP

CONFIDENTIAL

___________________________ AUTOMOTIVE SOLUTIONS MIL PAINT SOP PAINTING PROCESS SPECIFICATION ____________________________ 2020

AUTOMOTIVE SOLUTIONS

SHAFIR

INDIA

ISRAEL

Prepared By

Issued for

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Painting Instructions: 1. Verify the contractor is approved and underwent certification for the specific process, before work delivery.

2. Coupons (accompanying models) that underwent all finishing and painting processes, together with the units. Accompanying models will be defined and approved by Shafir , prior to contractor’s approval.

3. Regarding welded parts, it is required to receive coupons that represent the coating and welding processes along with the painted units.

4. Manufacturer's detailed process tag, including coating and painting proces processes, comparing to MASTER PANEL approved by the Materials Engineering (cleaning, coating, hydrogen embrittlement relief treatment if required, drying procedure, layers thickness, etc.).

Model Preperation & Process tag will include the following data: 

Colorr manufacturer’s name, painting device or specification for wash primer, primer and topcoat.

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The model will be visually divided into three equal parts.

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Paint layer thickness.

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Recording a serial number on the coupons as well as which Lot they represent.

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Paint int the coupon after surface preparation (as specified in the drawing).Paint so that on the same side of the coupon, exposed basic color is visible, as well as the top color covering the basic color on coupon continuation.

Surface Preparation and Painting Process for component: a. Sanding of Surface with Grit P180 Sanding Paper / Sanding Disks Disks.. b. Clean the panel for foreign contaminating using a degreaser or MIL MIL-T-81722B Type 2 c. APPLY BASE COAT PRIMER EPOXY PER AS 2030 EPOXY PRIMER Epoxy Primer Coating 40µ +5 MICRON THICK. This product may be used as a primer under CARC coatings specified in MIL MIL- PRF-85285E 85285E polyurethane Topcoats. d. Mixing Ratio refer product TDS.

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e. Minimum air dry ry time for primer is 8~12hrs between layers (need to be confirmed as per paint supplier). f.

Sanding of primer with Grit P400 Sanding paper.

g. Clean the panel for foreign contaminating using a AS 900 Epoxy Thinner h. Apply TOP COAT high solids high performance two component epoxy AS 2050 followed

by MIL-PRF-85285E 85285E (CARC) Polyurethane Top coat MAT MATT as per FED-STD-595C two layer dry film coat about 40~60 60µ thickness. i.

Leave for Air Drying for 12~24 Hours.

APPLICATION METHOD SANDING OF METAL WITH GRIP 180 180/ 220 SAND PAPER (MANUAL OR MECHENICAL) If Required DEGREASING OF SURFACE Use thinner supplied with primer AS 900 APPLY AS 2030 EPOXY PRIMER Ratio 1 Part Base + 0.333 Part Hardener ((AS 900 Thinner 20-25% on Part A & B ) Beaker Provided in Kit for Right Mixing Coating thickness 50~65 50~65µ. Apply 2 Coats total thickness: 100-130 μm.

LEAVE IT FOR DRYIN DRYING FOR 8 ~ 12 HOURS OR Force dry for 60 Min at 60 60℃ (after flash time of at least 30 minutes in air) INTERMEDIATE COAT CAN BE APPLIED AFTER 6 HOURS SAND THE SURFACE WITH GRIT P 400 IF YOU FIND NUST NIBS OR APPLYING AFTER 8 HOURS DEGREASE THE SURFACE APPLY INTERMEDIATE COAT AS 2050 Epoxy Top Coat Ratio 100:33 ( AS 900 Thinner 20-25% 25% on Part A & B ) Check ambient Temperature.

Apply two full coat of 50~80µ after flash off 10~15 min each coat to avoid solvent blistering.

Recommended 2 Coat’s to achieve thickness of 80~120 Micron.

LEAVE IT FOR DRYING FOR 8 ~ 12 HOURS Or Force dry for 60 Min at 60℃ (after flash time of at least 30 minutes in air) SAND THE SURFACE WITH GRIT P 600 DEGREASE & APPLY MIL-PRF-85285E 85285E Polyurethane Top coat After 6~8 Hours Ratio : 100:50 2 Part of Base + 1 Part of Hardener + Thinner 3

((AS 001 Thinner 20-25% on Part A & B ) Check ambient Temperature.

Apply two full coat of 40-50µ each after flash off 10~15 min each coat to avoid solvent blistering.

Total thickness: 60-100 μm.

Leave the Paint for Drying for 10 ~ 12 Hours Or Or Force dry for 60 Min at 60 60℃ (after flash time of at least 30 minutes in air) Total thickne thickness of dry coat of paint: 190-270 μm.

Please note all paint kit includes mixing beakers, strainers, mask, Goggles, Suit, gloves are provided in the kit for safety & application.

Special Instructions             

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Refer er product TDS for detailed application Mix using a paint mixer to get a smooth liquid with no bubbles nor solid paint remains.

Store component A and component B in a dust free area.

Use separate equipment for primer and topcoat painting, clean the equip equipment thoroughly after use.

Maintain thinner dilutions lutions of 15 15-20% for spraying application Viscosity: catalyzed 30 3 seconds (maximum) #4 Ford Cup for Paint & hardener mixed.

Shelf life of CARC paint one year only from manufacturing date (ensure expiration date).

Store the paint in a closed dry area.

Keep Paint Can Lids Air Tight use tape to sel the edges.

Do not paint with CARC without degreasing the surface as required in standard TT TT‐C‐490.

Do not paint with primer on a contaminated or dusted surface.

Ensure cleanliness of the equipment from thinner remains.

All Paint to be mixed as per mixing containers provide in the kit.

Paint Filtration products are provided with the paint for filtration use Paper Paint Strainer Mesh 80(190 Micron) for primer filtration & Paper Paintt Strainer Mesh 120(125 Micron for paint Filtration.These These can be ordered Separately.

It is mandatory to use two different spray guns for primer & MIL Top Coats Please make sure mixing sticks are used within the kits & paint supplied upplied by AUTOMOTIVE AUTOMOTI SOLUTIONS since the product is RoHs Complaint any use of contaminated mixing beakers or sticks may lead to contamination.

Use 3M Respirator Mask 6000 Series.

Preferable application in Paint Booth to avoid dust particles.

Humidity, Temperature, Air Pres Pressure are always a concern while painting.

All chemical testing to be performed after 7 days curing.

Orbital Sanders are best option to do dry sanding with Vaccum Suction.

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SAFETY & PRECAUTIONS Applicator is required to maintain safety norms while application of MIL M Top coatings and has to wear safety gloves, masks masks, goggles & anti static atic suit during application.

(The entire product is supplied with the MIL paint kit) Eye Protection Guidelines Safety glasses with side shields or chemical splash goggles.

Skin Protection Guidelines Wear liquid-proof, proof, chemical resistant gloves (nitrile-butyl butyl rubber, neoprene, butyl rubber or natural rubber) and full body body-covering clothing.

Respiratory / Ventillation Guidelines: Good room ventilation is usually adequate for most operations. Wear a NIOSH/MSHA approved respirator with an organic vapor cartridge whenever exposure to vapor in concentrations above applicable limits is likely.

INSPECTION METHODS Paint Coating Thickness Measurement 

Test will be performed on both sample plate and at least one product from every production Lot.

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For paint coating thickness measurement, use a calibrated coating thickness testing device.

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Product’s representative thickness will be determined by an average of 5 test surfaces representing the product.

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Product’s representative thickness will conform to the specification definitions for final paint thickness.

Resistance to Organic Solvents 

Inspection will be performed on both the sample plate and at least one product from every production Lot.

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Soak cotton wool in MEK methyl ethyl ketone.

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Rub the sample plate with cotton wool soaked in MEK, while moving cotton wool over 5 58 cm of the painted surface.

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Repeat (back and forth) at least 50 times. Any thick paint transfer to cotton wool indicates cates a faulty painting process, minor leaching is acceptable.

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Adhesion Test – per ASTM D 3359 

Test will be made on 3 3-5 5 sample plates, as well as on one product only from every production Lot (in area where color coating can be conveniently repaired).

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On the models, make a crisscrossed cut of 6 rows and 6 columns; cut 2 mm from each other, to obtain a grid pattern.

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Thoroughly attach adhesive tape to grid pattern, wait 60 60-90 90 seconds and tear off with quick pulling motion.

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The number of torn squares indicates the defect % resulting from deficiencies during painting process.

Case Study: AS 2030 Primer: For first time do trial and error method to achieve the required thickness with the gun spray. Below table shows an example to achieve paint coat thickness (req. 50µm),in that thinner dilution plays an important role.

SAMPLE

PRODUCT

COATS

THINNER DILUTION

MICRON

A

AS 2030 PRIMER

1

50%

70

B

AS 2030 PRIMER

1

50%

85

C

AS 2030 PRIMER

1

20%

50

D

AS 2030 PRIMER

2

20%

150

RESULT

PASS

Application Temeprature: 34 ℃

AS 2050 Intermediate Coat – GLOSSY. SAMPLE

PRODUCT

COATS

THINNER DILUTION

A

AS 2050 EPOXY – INTERMEDIATE COAT

1

20%

RESULT

OBSERVATION 60~70 MICRON SMOOTH FINISH

C

AS 2050 EPOXT – INTERMEDIATE COAT

1

30-35%

PASS

BUT THICKNESS MAY BE REDUCED

Application Temeprature: 32℃

For any application related support you can email us at info@automotivesolutions.net.in or Whatsapp at +9188515 24059 (7 AM to 10 PM) 6