Industry:
Date:
July 2019
Substrate:
Austenitic iron body
Products:
Chem-tect™ RB 364 Series – Glass Flake filled vinyl ester resin
Epo-chem™ RL 500PF to externals
Environment:
Sea Water
Challenge:
Strainer has been in service for 30 + years. Inspection of the strainer body, back wash covers & critical dimensions found the substrate to be severely corroded, illustrated by the extent of graphitised iron, holes through the casting and diminishing wall thickness
Chemcote’s Solution:
Composite materials were chosen to rebuild the metal loss. We then applied RB 364 series , a glass flake filled vinyl ester consolidated with composite reinforcing to return the casing to its original strength
Scope:
Protect threaded holes using backing rod
Abrasive blast and treat to reduce metallic salts by hot washing and re-abrasive blast.
Apply Chem-tect™ RB 364 in two coats where required to obtain minimum thickness of 1,000μm
Pitfill to reduce the sharp edges and pit depth allowing a smooth uniform coating to be applied.
QA included spark testing and DFT to confirm coating integrity
Apply coat of RL 500 PF to externals
Results:
After 15 years of Chemcote Coatings providing long term protection on other strainers and their backwash covers within the power station, Chemcote was enlisted for repairs to the 2 large Strainers to one of the main condenser units