Dear Peter,
You should consider to do as follows:
Try to determine composition of your thinner (e.g. using “safety material data sheet”) and next go to compare with Corrosion Survey Database (COR·SUR) NACE. There are many organic formulas relating to 304.
Best regards
I agree with „unclesyd” the problem is with periodical not contentious water receiving. There are at least four remedies.
1. (pointed out previously by unclesyd and others) is to find out sufficient and acceptable water treatment
2. you can also consider to find a minimal flow or maximal time...
It’s seams to be a scale, I suppose.
Some important questions more:
Does the buildup grows underwater, on surface of water, at splashed area or where condensation occurs?
Does acid dissolve it effectively?
How does it adhere to steel surface?
Waiting for reply
Two answer could help:
o What is the material (kind of steel) when buildup grows?
o What exactly composition of water there is in such well, any result of analysis?
Waiting for reply