碳纤维/环氧复合材料与不同金属材料的电偶腐蚀行为研究

STUDY ON GALVANIC CORROSION BEHAVIOR BETWEEN CARBON/EPOXY COMPOSITES AND DIFFERENT METAL MATERIALS

本文对碳纤维/环氧复合材料与30CrMnSiA高强钢和1Cr17Ni2不锈钢两种金属材料之间的电偶腐蚀行为进行了研究。采用扫描电子显微镜(SEM)观察了不同试验状态下金属材料表面的微观腐蚀形貌,对1Cr17Ni2不锈钢试样进行原子能谱分析。研究结果表明,在直接接触情况下,碳纤维/环氧复合材料与30CrMnSiA高强钢发生了明显的电偶腐蚀现象,与1Cr17Ni2不锈钢几乎没有发生电偶腐蚀现象。采用玻璃布/胶膜的阻隔防护方式对30CrMnSiA高强钢电偶腐蚀的阻隔效果非常明显,可以明显提高30CrMnSiA钢的耐腐蚀性,但对1Cr17Ni2不锈钢影响不大。碳纤维/环氧复合材料与30CrMnSiA高强钢需要进行防护后才能接触使用,与1Cr17Ni2不锈钢可以直接接触使用。

The galvanic corrosion behavior between carbon/epoxy composites and 30CrMnSiA high-strength steel and 1Cr17Ni2 stainless steel were studied in this paper. Scanning electron microscopy (SEM) was used to observe the microscopic corrosion morphology of metal surface under different test conditions. Atomic energy spectrum analysis of 1Cr17Ni2 stainless steel samples were carried out. The results showed that, in direct contact, carbon/epoxy composite with 30CrMnSiA high-strength steel had obvious galvanic corrosion, but with 1Cr17Ni2 stainless steel it had almost no galvanic corrosion. The barrier effect of glass cloth/adhesive film on 30CrMnSiA high-strength steel was very obvious, which could significantly improve the corrosion resistance of 30CrMnSiA steel, but had little impact on 1Cr17Ni2 stainless steel. Carbon/epoxy composite and 30CrMnSiA high strength steel could only be used after protection, and 1Cr17Ni2 stainless steel could be used directly.