OVERVIEW: Customer was looking for a quick turn around food safe coating that will provide corrosion and erosion resistance. We ensure strict QA procedures are followed including DFT and holiday testing to the required voltage to ensure many years of service
INDUSTRY
ENVIRONMENT
Constant salt water contact in seaweed filtering process
SUBSTRATE
Carbon steel Auger with a red oxide coating, in service for 2 years
CHALLENGE
Agitator had deteriorated over time causing rust and scale to contaminate the product
SOLUTION
Repeat abrasive blasting and hot washing to reduce metallic salts below 25 ppm. Pit filling of deep metal loss and composite reinforcement where required
SCOPE
Abrasive blast to AS 1627.4 Class 2.5, nominal 75µm profile.
High pressure hot wash to reduce soluble salt levels below 25ppm
Repeat Abrasive Blast
Insert backing rod in shaft end to prevent blocking up with coating
1 coat of RS500P at 100µm nominal thickness
2 coats of RA500M at 600µm nominal thickness
Carry out QA, spark test at 4kV and DFT to confirm coating integrity
PRODUCTS
OUTCOME
Quick turn-around allowing auger to return to service within the month
Strict QA requirements including DFT and holiday testing to the required voltage to ensure many years of service
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