Is there a surface build-up (metal spray) that meets MR0175?
Is there a surface build-up (metal spray) that meets MR0175?
(OP)
I am trying to find a method of building up the seal areas of valve bodies. Is there a metal spray process that can build-up a surface .030in and is also NACE MR0175?





RE: Is there a surface build-up (metal spray) that meets MR0175?
It is a natural requirement as you will never get a discontinuity free thermal spray coating. It's weld overlay only I'm afraid.
Steve Jones
Materials & Corrosion Engineer
http://www.pdo.co.om/pdo/
RE: Is there a surface build-up (metal spray) that meets MR0175?
RE: Is there a surface build-up (metal spray) that meets MR0175?
The substrate/body material is ASTM 'A350-LF2'(meets Nace MR0175/ISO 15156). Therefore I am not looking for a metallic coating to prevent SSC.
I am looking for a process to build-up an area enough to remachine a seal surface. My understanding of reading ISO 15156-2, A.2.1.5 is that spray metallizing is acceptable as long as it meets the requirements listed.
With regards to the first statement of ISO 15156-2, A.2.1.5 "metallic coatings....are not acceptable for preventing SSC", are these coatings acceptable for use in a H2S environment to prevent other corrosion if your base material meets? For example, if we were to build-up the seal area with electroless nickel plating to obtain a good sealing surface.
RE: Is there a surface build-up (metal spray) that meets MR0175?
http://www.electro-coatings.com/kantech.htm
If you decide to go the welding route take a look at the these machines.
I have used the Bortech and seen the Climax demonstrated. At one time you could rent a Climax Machine. A lot of shops have the Bortech machine
http://www.bortech.com/
http://www.cpmt.com/tool_over_bw.php
RE: Is there a surface build-up (metal spray) that meets MR0175?
Steve Jones
Materials & Corrosion Engineer
http://www.pdo.co.om/pdo/
RE: Is there a surface build-up (metal spray) that meets MR0175?
All the comments are appreciated.