Coating temperature limits
Coating temperature limits
(OP)
Can anyone give general guidance on coating temperature limits, and the operating temperature buffer limits of equipment to give? Are there any general guidelines / best practices out there that say something like select coating with at least 10% higher max temperature rating than operating temperature limit? Thanks.
RE: Coating temperature limits
There is no such guidelines for coating selection followed in the industry. I have worked with Clients who requires coating to meet the design temperature. In my personal opinion, 10% than the max OT is quite sufficient and decent selection.
Coco- NACE PCS
RE: Coating temperature limits
Contractors & Suppliers may find a temperature ratings on a data sheet and not really understand what the result implies. Likewise, the dilatants & plasticizers in a coating may not be stable at "continuous" elevated temperature and migrate out of the coating causing embrittlement, crazing or crack/shrink. Some coatings, (epoxies) might undergo a post cure phase that is beneficial. Some coatings will soften to a state of toughness, while others might easily be damaged by otherwise mild (typical) physical abuse. An elevated temperature could change the water absorption rate.
There are manufactures with R&D who confidently write such letters, companies that are too buried in bureaucracy to write these letters and companies that won't because they don't know (Compounders w/o R&D). There may be some exceptional companies to too buried in bureaucracy to write these letters but if they are, then if later a claim is generated, they will also handle it a a glacial pace.
RE: Coating temperature limits
Steve Jones
Corrosion Management Consultant
http://www.linkedin.com/pub/8/83b/b04
All answers are personal opinions only and are in no way connected with any employer.