Is anti-corrosion treatment required inside the calcium chloride carbon steel salt water tank?
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As the title suggests, I would like to ask everyone: does a calcium chloride salt water tank (made of ordinary steel plates) require anti-corrosion treatment inside? No theoretical analysis or reference materials for material selection – I’m hoping for answers from sailors who have used it in practice? If preservation is necessary, then discuss how to do it; otherwise, talk about the actual usage situation.
The chemical plant where I used to work had calcium chloride refrigeration salt water tanks, which were usually made of 8 or 10 iron plates coated with anti-rust paint. Due to the strong corrosive nature of saltwater, the anti-rust paint only provided protection for about half a year before the iron plates began to corrode gradually; 10 layers of iron plate could last around 5 years. Adding a corrosion inhibitor to saltwater (it seems to be some kind of chromium-containing compound; I can’t remember exactly) can reduce the degree of corrosion, but since this preservative is toxic, our company does not use it; instead, we opt for thicker iron plates. This post was last edited by zidian1982 on 2009-3-11 15:38.]
It is certain that it will last for some time, but the exact duration is not clear. Based on information from the workers who carry out the actual work, a conservative estimate is three months.
A simple method is to use epoxy resin to apply a layer of corrosion protection on the carbon steel tank; apply several layers if desired. As long as there is no human-induced damage, there should be no problems