OVERVIEW: The internals of the gas scrubbing pipe were previously lined using a ceramic filled epoxy which was visibly failing with signs of osmotic blisters. Chemcote removed the failed lining and provided long term corrosion protection
INDUSTRY
ENVIRONMENT
40-60°C Saturated Blast Furnace Gas – carbonic acid, which in turn reacts with iron to form iron carbonate and hydrogen gas
SUBSTRATE
Mild Steel Fabrication
CHALLENGE
The internals of the pipe which were previously lined using a ceramic filled epoxy were visibly failing with signs of osmotic blisters. Remove failed lining and provide long term corrosion protection
SOLUTION
Remove the failed ceramic filled lining by UHPWB and carry out further inspection. We recommended the application of RB 300 series@ 1200μm nominal thickness.
SCOPE
Assess on arrival
Abrasive blast to AS 1627.4 2005 Class 3, with a minimum 75μm profile
Hot wash to assist in the removal of metallic salts
Application of 3 coats of RB 300 series
Carry out high voltage Spark Test to ensure coating continuity and DFT checks
External application of RL 500PF in 2 coats
Top coat using RC 500 in two coats in Y44
OUTCOME
Customer saved thousands of dollars in replacement costs. With Chemcote’s application providing long term corrosion protection, many other components have been refurbished using similar methods both on site and within our fully equipped workshop located in Wollongong.
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