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What happens in these flaws?
DATE:2012-02-02   Views:9  Back

Obviously this is a good place for bacteria to hide since liquids carrying sanitizer have a hard time penetrating these small flaws, due mostly to the surface tension of the water. And since oxygen can't readily travel to these flaws, the protective CrO2 layer that stainless steel naturally forms in the presence of air (oxygen) can't form on the walls of the flaw. Eventually these flaws will grow through rusting of the base metal (iron). In extreme cases, these flaws can propagate through the wall of the tank and leak!
Although the weld-free fittings are more expensive than welded fittings, we think it's well worth it for peace of mind, clean bacteria-free beer, and a fermenter that will last a lifetime.

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