SELEET, M., ELSAIID, A., FARAG, H. (1991). Effect Of Copper And Zinc Additives On The Corrosion Rate Of Aluminium alloys In Aqueous Solutions. test, 4(ASAT CONFLENCE 14-16 May 1991 , CAIRO), 401-414. doi: 10.21608/asat.1991.25795
M. M. SELEET; A. ELBAZ ELSAIID; H. FARAG. "Effect Of Copper And Zinc Additives On The Corrosion Rate Of Aluminium alloys In Aqueous Solutions". test, 4, ASAT CONFLENCE 14-16 May 1991 , CAIRO, 1991, 401-414. doi: 10.21608/asat.1991.25795
SELEET, M., ELSAIID, A., FARAG, H. (1991). 'Effect Of Copper And Zinc Additives On The Corrosion Rate Of Aluminium alloys In Aqueous Solutions', test, 4(ASAT CONFLENCE 14-16 May 1991 , CAIRO), pp. 401-414. doi: 10.21608/asat.1991.25795
SELEET, M., ELSAIID, A., FARAG, H. Effect Of Copper And Zinc Additives On The Corrosion Rate Of Aluminium alloys In Aqueous Solutions. test, 1991; 4(ASAT CONFLENCE 14-16 May 1991 , CAIRO): 401-414. doi: 10.21608/asat.1991.25795

Effect Of Copper And Zinc Additives On The Corrosion Rate Of Aluminium alloys In Aqueous Solutions

International Conference on Aerospace Sciences and Aviation Technology
Article 31, Volume 4, ASAT CONFLENCE 14-16 May 1991 , CAIRO, May 1991, Pages 401-414    PDF (1.89 M)
Document Type: Original Article
DOI: 10.21608/asat.1991.25795
Authors
M. M. SELEET1; A. ELBAZ ELSAIID1; H. FARAG2
1Chem. Eng. Branch, Military Technical College, Cairo, Egypt.
2Armament Authority, Cairo, Egypt.
Abstract
The corrosion behavior of five Al alloyscontaining different amounts of copper (0-4%) or zinc (0-6%) was investigated in aqueous solutions of ammonium chloride, ammonium nitrate, sodium chloride, sodium hydroxide, and sodium silicate using weight loss measurements and eletrochemical methods, namely corrosion potential, polarization and cyclic polarization techniques. The results show that copper (or zinc) has an accelerating effect on the corrosion rate of the investigated alloys in all previous solutions except sodium hydroxide solution , where it has an inhibiting effect. The accelerating effect is explained by an anodic (in sodium chloride, sodium silicate, and ammonium chloride solutions) and cathodic (in ammonium nitrate solution) depolarization mechanism.The inhibiting effect is explained by an anodic polarization mechanism .
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