Search
Close this search box.

Chiller

OVERVIEW:    Tube sheets of this chiller were severely corroded due to a galvanic reaction between dissimilar metals. There was also severe pitting corrosion on sealing faces. A 72 hour shutdown period was utilised to complete the work with the tube internals were protected from abrasive blasting damage by inserting specially designed plastic caps.

ENVIRONMENT

60-80°C, re-circulated sea water

SUBSTRATE

Mild Steel water boxes & bronze tube sheets

CHALLENGE

Tube sheets of this chiller were severely corroded due to a galvanic reaction between dissimilar metals. A 72 hour shutdown period was utilised to complete the work. The tube internals had to be protected from abrasive blasting damage. There was also severe pitting corrosion on sealing faces.

SOLUTION

Tube internals were protected by inserting specially designed plastic caps.

The entire chiller face was abrasive blasted to ensure surface is clean and free of contamination. RB 300 was applied to tube-sheet face, followed by post machine sealing faces to ensure division plates mate, preventing interference and by-passing. Caps were removed. Chemcote also supplied nylon inserts to prevent tube end corrosion & cavitation.

PRODUCTS

Chem-tect™ RB 300 Series

OUTCOME

This client has become one of our regular customers. Chemcote has now conducted numerous jobs for this client over the past years, including multiple heat exchanger units. The photo to the left was taken during a 4 year inspection of another chiller unit coated with the same coating and showed no signs of deterioration.

RELATED CASE STUDIES

Base Plate Corrosion Prevention

Repairs required Application of Primer Coating applied to affected areas After application of Topcoat Previous Next OVERVIEW:    A 40 year old excess gas bleeder structure

Read More »

Industrial Fallout Protection

After whip abrasive blasting Application of Epo-chem system to internals Basalt Fibre application on internals OVERVIEW:    A steel production plant contracted Chemcote to reinforce

Read More »
Contact Our Specialist Coating Advisors