The inhibition effect of inorganic compounds on the corrosion of the 3003 aluminium alloy in the presence of sodium chloride
作者:L. Bazzi、R. Salghi、A. Bouchtart、Z. El Alami、S. Kertit
DOI:10.1051/metal:2002192
日期:2002.2
This study concerns the inhibition of the corrosion of the aluminium alloy 3003 in a solution of 3% NaCl by Li+, Mg2+, MoO42-, NO2- and CrO42- ions. The methods used are the determination of the polarization curves and the metallographic examination of the surface condition. The results obtained show that the tested ions inhibit the corrosion process.The comparative study of the effect of these ions shows that the Mg2+ ions are the most efficient ones in the temperature range from 25 to 65°C. The inhibition efficiency increases with the concentration of these ions and reaches a maximum value of 86% for 5 × 10-2 alloy. As a consequence, the gap between pitting and corrosion potentials becomes larger. At 75°C, Mg2+ ions tend to stimulate corrosion of alloy 3003 in the chloride solution considered.
本研究涉及Li+、Mg2+、MoO4对3003铝合金在3% NaCl溶液中的腐蚀抑制作用2-、NO2- 和 CrO42- 离子。使用的方法是极化曲线的测定和表面状况的金相检查。结果表明,测试的离子对腐蚀过程有抑制作用。对这些离子效果的比较研究表明,在25至65°的温度范围内,Mg2+离子是最有效的离子C.抑制效率随着这些离子浓度的增加而增加,对于 5 × 10-2 合金达到最大值 86%。结果,点蚀电位和腐蚀电位之间的差距变得更大。在 75°C 时,Mg2+ 离子往往会刺激所考虑的氯化物溶液中 3003 合金的腐蚀。