The passivity tester we use is the Walter Surfox passivity tester. Do you or anyone else have any information regarding the reliability of this tester? It often seems inconsistent to me, which makes finding the root of our issues all the more challenging.
Something that I forgot to mention is that we tested the tubing at the site of rusting (rust only appeared on a small stretch of tube), and that section tested as passive. The ends, which were non passive, didn't have any rusting that I could see. We used an open circuit potential tester, so...
While testing a batch of stainless steel tubing, it was noticed that there was a small amount of what appeared to be rust on the ID of a tube. The tube was cut open through the center axis so the ID was exposed, and it did appear there was rusting. We decided to test the passivity of the...
