Super Duplex Steel
Chem-tect™ RB 364CS vinyl-ester glassflake
Chem-tect™ RB 300TC vinyl-ester topcoat
Chem-tect RC 364
Nickel Laterite mine operating at 100°C. Vessel is required to contain and hold Sulphuric Acid Slurry as part of the leaching process.
Internals had previously been coated with a widely accepted epoxy which failed within months causing the substrate to corrode. Pitting was experienced and protection against long term exposure to acid was required.
Externals needed protection from acid rain and atmospheric corrosion, also needing a durable hard-wearing finish.
Achieving adequate adhesion to Super Duplex is a challenge for every coating, RC364 was selected for its adhesion to exotic materials.
RB 300 provides excellent corrosion resistance, creating an impermeable barrier between the process environment and substrate.
Abrasive blast with Aluminium Oxide to class SA 2.5 90μm surface profile.
Apply RC364 to a DFT of 400μm on internals and externals
Apply RB364CS to a total DFT of 1mm on internals
Apply RB300TC to the total DFT of 400μm externally
After a year the tank is still in excellent condition, the client has requested the same treatment on other vessels within the site.
Coating selection, approvals and application was performed by CCS – Distributor Agent of Chemco International in Western Australia.
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