OVERVIEW: Engineers had previously tried different coatings with varied results. The aggressive environment had required structural steel repairs to be carried out every two years as the regular thermocycling in service exceeds many coatings limitations.
Chemcote had previously completed successful repairs on hot car structures in situ, we were asked to provide the same solution for repairs to the hot car bogies
INDUSTRY
ENVIRONMENT
Hot Car Bogie for a 1,000°C Coking Coal transport wagon, quenched using 80°C water
SUBSTRATE
Hot Car Bogie – Carbon steel substrate
CHALLENGE
Abrasive blasting is not always possible on site due to work alongside other trades and tight time frames, mechanical surface preparation is undertaken.
SOLUTION
RE 500P is a surface tolerant high temperature resistant epoxy coating. It is an innovative single coat maintenance system with outstanding adhesion to less prepared substrates.
Top coated with RW 500, glassflake filled, high temperature resistant Novolac Epoxy, the system provides excellent corrosion resistance in this environment.
SCOPE
Abrasive blast Hot Car Bogie to AS 1627.4 Class 2.5 with a nominal 50-75µm profile
Application of RE 500P in one coat at 100µm nominal
Assembly by Fabricator
Mechanical clean/sand gear boxes
Application of Epo-Chem RW 500 in two coats
PRODUCTS
OUTCOME
A yearly inspection of Chemco’s high temperature coating systems has indicated that our linings are in much better condition with less maintenance required, reducing downtime and resources.
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