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通过试验证明，硝酸盐（硝酸钠或硝酸钙）作为防冻剂的组份，对砼中的钢筋没有阻锈作用，而可能有促锈作用。
It has been proved through experiments that nitrate (sodium nitrate or calcium nitrate) as a component of antifreezing agent has no rust-inhibiting effect on reinforcing steel in concrete but may have rust-promoting effect.