Material Problems

Potential Problems:

Potential Causes:

  • Foreign Material on surface of Stainless Steel


Rust spots that show up on the surface of the unit are typically not signs of the base stainless steel material corroding. Often, they are foreign material, such as welding slag, that has collected on the surface of the unit. The rust spots will be located around where there has been welding. These areas may include the coil connections, the cold water basin near the support steel, and around field erected platforms and catwalks. The rust spots can be removed with a good cleaning. EVAPCO recommends using either Naval Jelly or a good stainless steel cleaner, such as Motherʼs Wax in conjunction with a Scotch-Brite pad. Maintenance of the unitʼs surface should be done on a regular basis.

  • Cracking paint


Most of the time, it is the paint that is cracking and not the insulation. If the paint is degrading, it should be touched up to maintain the finish on the insulation. It is recommended that maintaining the finish of the insulation paint be a part of the standard maintenance program. If the insulation is cracking, see your local Evapco representative for further guidance.