Anodically Protected Acid Storage Tanks
Chemetics® ANOTROL® anodic protection systems for sulfuric acid storage tanks provide superior corrosion resistance for acid storage to enhance tank reliability and longevity.
Anodic protection system to match your site requirements. ■■ANOTROL Tank Anodic Protection System provides simple and effective protection of corrosion ■■Reduction in general corrosion rate on carbon steel tanks by up to 90% (93% sulfuric acid) and 50% (98% sulfuric acid) ■■Integrated safety present in design to ensure system reliability ■■Installed on more than 200 acid storage tanks over the past 50 years ■■Available for tanks containing 77 – 99% sulfuric acid, as well as up to 35% oleum ■■Tanks designed to local standards and to API 650 or equivalent, up to 40,000 tons ■■Chemetics’ storage tank designs minimize effects of localized corrosion – hydrogen grooving, hydrogen blistering and local corrosion
About Chemetics Sustaining our world for generations to come through technological and environmental innovation, Worley delivers Comprimo® sulphur and Chemetics® sulphuric acid solutions around the globe with a focus on site reliability, plant economics and workforce development. Over the past 50 years, Chemetics’ full life cycle solutions and equipment have enabled more than 800 plants achieve higher capacities and availability, lower costs of operation, reduced emissions and greater safety. Leveraging our R&D lab and custom-built fabrication facility in Canada, global transportation and logistics management capabilities, specialized project teams and worldwide network of trusted suppliers, we deliver optimal solutions and equipment for your sulphuric acid facility, from greenfield projects to maintenance and turnarounds.
Visit worley.com/chemetics | Contact us chemetics.equipment@worley.com | Business Development: +1 905 619 5200 © 2019 Chemetics Inc. All rights reserved.
Client Solutions Anodically Protected Storage Tanks Features and Benefits: ■■ Corrosion Control – Polarization of carbon steel results in creating a protective oxide film between the tank wall and acid by running an anodic current from the immersed cathode. ■■ Hydrogen Control – Hydrogen liberated through general corrosion is immediately drawn to the cathode where it rises to the surface to eliminate contact with the tank, drastically reducing localized hydrogen grooving, hydrogen blistering or damage to manways present in common sulfuric acid storage tanks. ■■ ANOTROL System – Acid storage tanks utilize the same system used on more than 3000 acid cooler installations around the world in a different configuration. Reference electrodes are used to measure anodic potential and the cathodes to supply the required current for the protective film.
Hydrogen Grooving Corrosion Often Seen on Sulfuric Acid Tanks without Anodic Protection
■■ Ease of Service/Installation – All Reference Electrodes/Cathodes are mounted on the roof with the Controller/Power Supply mounted close to the tanks for reduction of wiring runs. ■■ Remote Display Unit [RDU] – this unit displays the anodic status of the system, along with the capability of providing a 4-20 mA output from a level sensing device which includes a visual readout on the screen. This allows for ease of monitoring the overall system and its corrosion protection. ■■ Metallurgy Selection – Typical acid storage tanks are carbon steel; however, due to corrosive service life span is reduced. Chemetics circumvents this problem through anodically protected carbon steel or stainless steel storage tanks. ■■ On Site or Remote Technical Service – Chemetics’ technical service team is available to provide site inspections, maintenance and operator training globally for acid storage tanks.
ANOTROL Controller/Power Supply (C/PS) Module
Reduction in General Corrosion with Addition of Anodic Protection
Anodic Protection Polarization Curve