Cast Iron, Potable Fresh Water Pump Body
Can you recommend a process to clean rust and “cure” the interior of a pump housing to prevent rusting and not affect the quality of the water?
Q. The inside of a pump is rusting to the point that small rusted parts flake off. Can you recommend a process to clean rust and “cure” the interior of the pump housing to prevent rusting and not affect the quality of the water? C.W.
A. Cast irons can be “active” and rust rather quickly. If the level of rust is moderate, and it does not sound like it is very adherent, a phosphoric acid cleaner may be ideal to clean and remove the rust residue. Additionally, phosphoric acid cleaners are unique in that they can leave a deposit that is similar to that of a very simple, lightweight phosphate coating on the surface which can provide the “cure” or passive surface you are looking for. Increasing time and temperature (if possible) will accelerate the process and/or do a better job removing existing rust.
Related Content
-
Vacuum Degreaser Cleans Up a Messy Situation
By replacing its immersion parts washer with a vacuum degreasing system, this machine shop is much more efficient, saving the company money, man hours and the health of the operators.
-
Top Reasons to Switch to a Better Cleaning Fluid
Venesia Hurtubise from MicroCare says switching to the new modern cleaning fluids will have a positive impact on your cleaning process.
-
3-Stage Versus 5-Stage Washers
Columnist Rodger Talbert explains the difference between a five-stage washer and a three-stage washer, and how one provides better corrosion protection over the other.