Cathodic protection UST

[cjfam]

I have a railcar that we will be burying and using as part of a water cooling system. It is stainless steel and is about 18,000 gallons. Does anyone have tips regarding sizes and materials for cathodic protection for this application. I do not know the soil conductivity yet.

Thanks

 

[kenvlach]

Stainless steel doesn't require protection in most soils. Also, cathodic current could undo the normal passive oxide film on the SS. Can we presume 304 SS?

Analyze the soil for salinity (actually, Cl^- & F^-), pH and anything like sulfide that might feed nasty microbes.

 

[SJones]

The first tip is to coat the item with a carefully selected and qualified coating system. A thermal spray coating may alleviate any need for CP arising from your soil corrosivity assessments.

Steve Jones
Materials & Corrosion Engineer

http://www.pdo.co.om/pdo/