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.
RELATED CASE STUDIES
Fast Curing Abrasion Protection
Condition of surface before mechanical preparation RB 364 applied to spot abrasive blasted surfaces Pugmill externals Coating with InD Cote OVERVIEW: Chemcote’s specialist team
Split Case Salt Water Pump Refurbishment
Apply protection to all machined surfaces Application of 1st coat RB 364 Apply Ceram-Chem RP500 Ready to return to service for another 15+ years of
Composite Pipe Repair
Flange is barely attached Repairs commence Repairs using composite weave mat Coating complete OVERVIEW: A power station client required corrosion protection for a 30-plus