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Epo-chem™ 500 Series for Pump & Base


Epo-chem™ 500 Series for Pump & Base


Mining and Mineral Processing,



April 2010,



Steel multi-stage pump casing, galvanised coupling,



Epo-chem™ RL 500PF,

Epo-chem™ RW 500 – Solvent Free Novolac Epoxy,



80°C corrosive aqueous ammonia,



The client required an external coating system to provide long term protection to their newly purchased multi-stage pump assemblies against an aqueous ammonia environment at elevated temperatures. The coating system was required to act as a corrosion barrier for the pump case should any leaks occur whilst in service. Abrasive blasting could not be deployed due to the risk of damaging critical components.


Pump with factory shop primer
Pump with factory shop primer
Completed coated pump
Completed coated pump
Complete coating of pump, coupling guard, channel base frame & two pole motor
Complete coating of pump, coupling guard, channel base frame & two pole motor


Chemco’s Solution:

We recommended RL 500PF which primes and finishes in 1 coat. This coating system requires minimal surface preparation. It is moisture/surface tolerant coating is ideal for site. Rain or high humidity has no effect on painted surfaces.

We followed this with RW 500, a solvent-free epoxy Novolac which imparts outstanding protection to metal substrates. It forms a durable barrier resistant to abrasion, erosion, thermal shock, and the most aggressive environments of high temperature and chemicals in immersed and non-immersed conditions.



  • Mask off seal areas, ID plates and critical exposed fittings. Mechanically prep surface, solvent wash with MEK
  • Prime with 1 coat RL 500PF to prepared surfaces
  • 2 coats RW 500 to a DFT of 400µm
  • DFT checks, mount onto base frame, assemble coupling guard



The two product systems applied by skilled resolved the no abrasive blasting issue and currently provides durable protection against a high temperature corrosive aggressive environment.


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