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Corrosion Protection of Basket Strainer

OVERVIEW:    The customer required  quick repairs and minimal disruption during their project. 

Heavy corrosion was removed to assist in some necessary weld repairs, with the rest of the holes and heavy localised pitting through the body restored to the original surface profile, rebuilding using RA 500M. 

ENVIRONMENT

Salt water strainer

SUBSTRATE

Basket Strainer – Steel

CHALLENGE

Repeat abrasive blasting and hot washing to reduce metallic salts below 25 ppm. Pit filling of deep metal loss and composite reinforcement where required.

SOLUTION

Repeat abrasive blasting and hot washing of basket strainer to reduce metallic salts below 25 ppm. Pit filling of deep metal loss and composite reinforcement where required.

SCOPE

High pressure hot wash and repeat abrasive blast to reduce soluble salt levels below 25ppm

Abrasive blast to AS 1627.4 Class 2.5, nominal 75µm profile.

Application of RS500P, then two coats of RA500M Series to obtain minimum thickness of 500µm

Cast sealing ring for O ring groove rebuilding the original surface profile using RA500M

Carry out QA, spark test at 4kV and DFT to confirm coating integrity.

Quick turn-around allowing minimal disruption to meet project milestone targets.

Strict QA requirements including DFT and holiday testing to the required voltage to ensure many years of high performance

PRODUCTS

Epo-Chem™ RS 500P a wet and surface tolerant epoxy primer containing 100% solids and RA 500M a wet tolerant, glass flake filled epoxy containing 100% solids. Both products are capable of being applied in high humidity including under water.

OUTCOME

Quick turn-around allowing minimal disruption to meet project milestone targets.

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