铝合金应力腐蚀裂纹内氯离子浓度的分布

Chlorine Ion Distribution in the Stress Corrosion Cracking of Aluminium Alloy

研究了ＬＣ４铝合金在３．５％和０．０３５％ＮａＣｌ水溶液中，应力腐蚀裂纹内氯离子浓度的分布。结果表明：裂纹内氯离子浓度升高，外部环境中氯离子浓度对裂纹内氯离子浓度影响较小；在极化状态下，裂纹内氯离子浓度与极化电位的关系，同裂纹内铝离子浓度及ＰＨ值与极化电位的关系有着相对应的规律。

This paper studys the chlorine ion distribution in the stress corrosioncracking of LC4 Aluminium alloy in 3.5%NaCl and 0.035%NaCl aqueous solution. Thereeults suggest:as the chlorine ion's concentration in the cracking grows,the concentration inthe external environment has a little effect on it;while in the polarization state,the relfltionbetween the concentration of chlorine ion and the polarization potential follows the corre-sponding law that the concentration of Aluminium ion and PH value are related to polar-ization potential.