In modern decoration engineering, stainless steel is widely used. Stainless steel has the characteristics of high surface brightness, strong corrosion resistance and not easy to rust.

　　不锈钢的主要组成的元素就是铬元素，能够说不锈钢是一种铬元素合金钢。铬含量越高，耐腐蚀性能越好.不锈钢具有较高耐锈蚀性的缘由，是其中铬合金元素的性质比铁生动，它首失与环境中的氧化合，生成一层与基体结实分离的、致密的氧化膜层，即钝伙膜。钝化膜能很好地维护合金不受锈蚀。

　　The main element of stainless steel is chromium. It can be said that stainless steel is a chromium alloy steel. The higher the content of chromium, the better the corrosion resistance. The reason why stainless steel has higher corrosion resistance is that the properties of chromium alloy elements are more vivid than that of iron. It first lost the oxidation with the environment, and formed a layer of dense oxide film which is separated from the matrix firmly, that is, passive film. The passivation film can protect the alloy from corrosion.

　　不锈钢按耐腐蚀的特性分为普通不锈钢和不锈耐酸钢两种。普通不锈钢不—定耐酸，而耐酸钢普通都具有良好的耐腐蚀性。

　　Stainless steel can be divided into ordinary stainless steel and stainless acid steel according to its corrosion resistance. Ordinary stainless steel is not acid resistant, but acid resistant steel has good corrosion resistance.

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