冶炼了含Ni和Ni-Cr复合钢，采用室外暴晒试验结合锈层成分分析，腐蚀速率计算等研究了其在热带海洋大气环境中的腐蚀行为。结果表明:普碳钢、含Ni钢、和含Ni-Cr复合钢在试验环境中的腐蚀速率分别为66.84，41.54，38.29 μm/a。合金元素Ni、Cr明显提高钢的耐蚀性。试样表面锈层主要由γ-FeOOH、α-FeOOH组成，还包含较小的Fe₃O₄颗粒和FeO片层。普通碳钢的锈层比另外两种试样厚，锈层中α-FeOOH含量更高、更稳定，而加Ni、Ni-Cr的试样经过半年试验后，表面未生成稳定锈层。经过半年室外暴晒试验，Ni元素在锈层中含量较少，但是在锈层下钢材内有富集现象。点蚀坑中存在Cr、Cu元素富集。

Steels containing Ni and Ni-Cr were smelted, and the corrosion behavior of these steels in tropical marine atmosphere was studied by outdoor exposure test combined with rust layer composition analysis and corrosion rate calculation. The results showed that the corrosion rates of plain carbon steel, Ni-containing steel, and Ni-Cr-containing steel in the experimental environment were 66.84, 41.54, and 38.29 μm/a, respectively. Alloying elements Ni and Cr significantly improved the corrosion resistance of steel. The rust layer on the surface of samples was mainly composed of γ-FeOOH and α-FeOOH, and also contained relatively small Fe₃O₄ particles and FeO lamellae. The rust layer of ordinary carbon steel was thicker than that of the other two steels, and the content of α-FeOOH in the rust layer of carbon steel was higher and more stable, while the samples with Ni and Ni-Cr had no stable rust layer formed on the surface after half a year of testing. After half a year of outdoor exposure test, the content of Ni element in the rust layer was small, but there was an enrichment phenomenon in the steel under the rust layer. Cr and Cu were enriched in pitting pits.