OVERVIEW: Illustrated a sound understanding of the results required to refurbish and extend the life of heavily corroded equipment. Proven performance after 20 years of using “Chemco International” coatings.
Chemcote has provided long term protection on other strainers and their backwash covers within this power station.
INDUSTRY
ENVIRONMENT
Sea Water
SUBSTRATE
Austenitic iron body
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
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
PRODUCTS
OUTCOME
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
RELATED CASE STUDIES
22 year old pipes coated with glass flake vinyl ester
Internal lining in excellent condition Abrasive blast externals Recoating of externals Recoating of externals in basement OVERVIEW: The pipes were originally coated internally using
Premature Failure of 316L Stainless Steel Pipes
Severe pitting after 2 months in service After abrasive blasting Damaged internals rebuilt and coated Externally applied caution OVERVIEW: New 316L pipe failed after
Corrosion protection ensures a long life for a new 98% Sulphuric Acid Bund
Newly constructed bund Primer application Application of final coat Job completed OVERVIEW: Chemcote was contracted to apply acid protection to a newly constructed delivery