采用三因素三水平正交试验设计合金成分,实验室炼制轧制耐候钢,采用室内加速周浸腐蚀试验研究了在NaCl模拟海洋大气环境中合金元素铜、硅、镍对耐候钢耐蚀性影响的交互作用。结果表明,铜、硅、镍对耐蚀性影响的顺序为:铜>硅>镍,三因素对耐候钢耐蚀性影响交互作用明显;方差分析表明铜为高度显著影响因素,硅和镍为非显著影响因素;三种元素的最优含量搭配为:Cu0.15-Si0.6-Ni0;铜、硅、镍交互作用影响下,一定范围内适当减少贵金属铜、镍的用量以降低生产成本是可行的。

The relative function of effects of Cu,Si and Ni on the corrosion resistance of weathering steels in a simulated marine atmospheric environment was conducted by means of immersion corrosion experiment after designing alloy composition based on the three factors-three levels orthogonal test and preparing weathering steels in laboratory. The results showed that the relative function of effects of Cu,Si and Ni on corrosion resistance of weathering steels was great,and the influence of the three factors exhibited the following order:Cu>Si>Ni. The analysis of variance showed that Cu was a significant influencing factor,Si and Ni were nonsignificant influencing factors. The optimal composition ratio of weathering steels had been determined to be Cu0.15-Si0.6-Ni0. It′s properly feasible to reduce the dosage of precious metals Cu and Ni within a certain range in order to cut down the cost of production under the interaction between Cu,Si and Ni.