Comparative study of corrosion in galvanized steel and different aluminum alloys

Comparative study of corrosion in galvanized steel and different aluminum alloys

Xavier, F. L.; Pinheiro, F. P.

Full Article:

This academic work is a comparative about corrosion of galvanized steel and aluminum alloys, to determine their performances in different corrosive media with aim of to direct their applications. The parameters of corrosion rate, corrosion potential, potential for formation of pits and polarization resistance were obtained through of Electrochemical corrosion techniques, like: cyclic potentiodynamic polarization, electrochemical impedance spectroscopy, combined with corrosive media based on chloride and ammonia, used for industrial general cleaning. The aluminum alloys, 3105, 6082, and anodized 6082, presented more resistant than galvanized steel for the tests. Among the aluminum alloys, the anodized was more efficient than others, being indicated for applications that require mechanical resistance and aesthetics.

This academic work is a comparative about corrosion of galvanized steel and aluminum alloys, to determine their performances in different corrosive media with aim of to direct their applications. The parameters of corrosion rate, corrosion potential, potential for formation of pits and polarization resistance were obtained through of Electrochemical corrosion techniques, like: cyclic potentiodynamic polarization, electrochemical impedance spectroscopy, combined with corrosive media based on chloride and ammonia, used for industrial general cleaning. The aluminum alloys, 3105, 6082, and anodized 6082, presented more resistant than galvanized steel for the tests. Among the aluminum alloys, the anodized was more efficient than others, being indicated for applications that require mechanical resistance and aesthetics.

Palavras-chave:

DOI: 10.5151/chempro-s3ie2016-02

Referências bibliográficas

• [1] Portal Brasil. “PIB do Agronegócio cresceu 1,8% em 2015”, acessado em 5 de março de 2016.
• [2] GENTIL Vicente. CORROSÃO. São Paulo: LTC; 2010.
• [3] GODARD Hugh P; JEPSON, W.B.; BOTHWELL M. R.; KANE, Robert L. THE CORROSION OF LIGHT METALS. Nova Iorque: The Electrochemical Society; 1967
• [4] ABCEM – Associação Brasileira de Construção Mecânica: “O que é galvanização a fogo (zincagem por imersão a quente)”, acessado em 12 de março de 2016. Disponível em: http://www.abcem.org.br/galvanize/galvanizacao-a-fogo-artigos-tecnicos.php
• [5] ALTENPOHL. Dietrich G. ALUMINUM: TECHNOLOGY, APPLICATIONS AND ENVIROMENT. Sexta edição. Washington: The Aluminum Association; 1998.
• [6] SONG, Y. and Hung, P. Electrochemical Impedance Spectroscopy Analysis on Type III Anodized Aluminum 6061-T6 with Thermal Cycling. 2015 ANODIZING CONFERENCE, San Diego, California. Aluminum Anodizers Council.

Como citar:

Xavier, F. L.; Pinheiro, F. P.; "Comparative study of corrosion in galvanized steel and different aluminum alloys", p-21-32. In: Proceedings of 2nd International Seminar on Industrial Innovation in Electrochemistry . São Paulo: Blucher, 2016. São Paulo: Blucher, 2016.
ISSN 23184043, DOI 10.5151/chempro-s3ie2016-02