Stainless doesn't react like that. Is there a Metal that would work better? Stainless welded with a stainless rod isn't a problem. Even so, there is a usable life cycle to any tank. I am personally aware of stainless tanks that have exceeded their lifecycle with minimal wall degradation..Over 50 year in an acid environment. So, what are you implying? Their tanks will fall apart? Is this your newest fault with SHMP? Please. If nothing more, it is the cost of doing business. Try again.