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Protecting 300 stainless from muriatic acid

We have 301 stainless steel coil springs that are being attacked by muriatic acid. We need to find a coating or plating to protect the spring.

Steve Mansfield
- Erie, Pennsylvania
2005

Is yours a new design? Most engineers or designers dealing with muriatic (hydrochloric) acid know that eventually it will corrode almost any metal (except noble metals like gold, platinum, etc.). Is there ant way you can isolate the spring or switch to another elastic non-metallic material like rubber?

Guillermo Marrufo
Monterrey, NL, Mexico
2005

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Steve,

There is perhaps just one plastic that might serve your purpose and that is the 2 component polyurethane.

They claim that it can take a 200% stretch ... and considering that you are into springs, this may do the job due to its good flexibility.

However, I'd check on the corrosion resistance which isn't as good as PVC, for example.

Freeman Newton [deceased]
(It is our sad duty to advise that Freeman passed away
April 21, 2012. R.I.P. old friend).
2005

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As one other person mentioned, PVC would be a good choice for coating the stainless steel. We make a liquid PVC coating. Please see us in the ad section and contact us at our office. I will be more that happy to help.

Keith Ayers Cedartown, Georgia 2005