添加Fe对Al-0.7Mg-0.6Si合金腐蚀行为的影响
Influence of Fe Addition on the Corrosion Behavior of Al-0.7Mg-0.6Si Alloys
DOI: 10.12677/MS.2019.912133, PDF,   
作者: 田爱琴：中车青岛四方机车车辆股份有限公司，国家工程技术中心，山东 青岛；中南大学材料科学与工程学院，湖南 长沙；邓运来*, 池水清：中南大学材料科学与工程学院，湖南 长沙
关键词: Al-Mg-Si铝合金；Fe含量；腐蚀性能；微观组织；Al-Mg-Si Alloy； Fe Addition； Corrosion Properties； Microstructures
摘要: 本文以添加0.1~0.3 wt% Fe含量的Al-0.7Mg-0.6Si合金为对象，分别研究了不同Fe含量在中性NaCl溶液和酸性HCl溶液中的腐蚀行为，通过扫描电镜表征了浸泡腐蚀后样品表面的腐蚀形貌和腐蚀产物，在金相显微镜下表征了晶间腐蚀的截面深度，并与恒应力腐蚀后材料屈服强度的损失情况对比。结果表明，添加不同Fe含量的Al-0.7Mg-0.6Si合金材料的应力腐蚀性能存在差异。在3.5% NaCl腐蚀环境中，Al-0.7Mg-0.6Si合金对应力腐蚀不敏感，应力腐蚀性能未表现出明显差别；在酸性腐蚀环境中进行应力腐蚀实验，Al-0.7Mg-0.6Si合金强度的损失随着合金内Fe元素含量的提高而提高，应力腐蚀性能变差。随着微量元素Fe含量的提高，Al-0.7Mg-0.6Si合金内的AlFeSi相数量逐渐增多，并会使得合金材料的应力腐蚀性能变差。
Abstract: In this paper, the corrosion behavior of Al-0.7Mg-0.6Si alloy with 0.1~0.3 wt% Fe content in neutral NaCl solution and acid HCl solution was studied. The corrosion morphology and products of the sample surface after immersion corrosion were characterized by SEM, the cross-section depth of intergranular corrosion was characterized by metallographic microscope, and the yield strength loss of the material after constant stress corrosion was compared. The results show that the stress corrosion behavior of Al-0.7Mg-0.6Si with different Fe content is different. In 3.5% NaCl corrosion environment, Al-0.7Mg-0.6Si is not sensitive to stress corrosion, and its stress corrosion performance does not show significant difference; in acid corrosion environment, stress corrosion experiment shows that the loss of strength of Al-0.7Mg-0.6Si increases with the increase of Fe content in the alloy, and the stress corrosion performance becomes worse. With the increase of Fe content, the amount of AlFeSi phase in Al-0.7Mg-0.6Si increases gradually, and the stress corrosion performance of the alloy materials will be worse.
文章引用：田爱琴, 邓运来, 池水清. 添加Fe对Al-0.7Mg-0.6Si合金腐蚀行为的影响[J]. 材料科学, 2019, 9(12): 1083-1091. https://doi.org/10.12677/MS.2019.912133

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