大气腐蚀的协同作用
( 1. 中国科学院金属研究所 金属腐蚀与防护国家重点实验室,
沈阳 110016;
2. 沈阳建筑大学 材料科学与工程学院, 沈阳 110168)
摘 要: 在实验室模拟条件下(25 ℃， 85%±5% RH)， 通过失重法、 扫描电镜、 傅立叶红外光谱和X射线衍射研究了可溶盐和SO2对AZ91D镁合金大气腐蚀行为的影响。 结果表明： 可溶盐和SO2气体均能明显地加速AZ91D镁合金的腐蚀， 而且两者之间对其腐蚀具有协同作用。 对其腐蚀机理和协同作用进行了讨论。
关键字: 大气腐蚀; 镁合金; 可溶盐; SO2
（ 1. State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;
2. School of Materials Science and Engineering, Shenyang Jianzhu University, Shenyang 110168, China）
Abstract: The atmospheric corrosion behavior of diecast AZ91D magnesium alloy deposited with different salts and in the presence of SO2 (25 ℃ and 85%±5% RH) was studied by gravimetry, Fourier transform infrared spectroscope, scanning electron microscopy and X-ray diffraction. The result shows that there is synergetic effect of the soluble salts and SO2. Both the soluble salts and SO2 can accelerate the atmospheric corrosion of AZ91D magnesium alloy. The synergetic effect of the soluble salts and SO2 may enable the atmospheric corrosion of metallic materials greater than that caused by single component of the two respectively.
Key words: atmospheric corrosion; magnesium alloy; soluble salts; SO2
