Uma experiência didática de corrosão usando colorimetria visual

In this paper, a simple and rapid method of evaluating galvanized steel sheet corrosion in a CuSO4 solution, as an experimentation proposal for corrosion teaching. Galvanized steel corrosion is present in tanks and tubing by leading of natural or industrial waters which contain soluble copper compou...

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Bibliographic Details
Published inQuímica Nova Vol. 35; no. 3; pp. 634 - 637
Main Authors Bidetti, Bárbara Bidoia, Balthazar, Priscila Aoki, Vaz, Ednilson Luiz Silva, Codaro, Eduardo Norberto, Acciari, Heloisa Andréa
Format Journal Article
LanguageEnglish
Published Sociedade Brasileira de Química 2012
Subjects
chemistry education
corrosion
social interaction
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Summary:In this paper, a simple and rapid method of evaluating galvanized steel sheet corrosion in a CuSO4 solution, as an experimentation proposal for corrosion teaching. Galvanized steel corrosion is present in tanks and tubing by leading of natural or industrial waters which contain soluble copper compounds. This was the rationale for choosing the Cu2+ ions solution as an oxidizing agent. The method principle is based on visual colorimetry because the used oxidant has an intense blue color. Thus, a change in its concentration as a result of the corrosive process can be followed by a color intensity change in the solution thereby allowing evaluation of the corrosion rate.
ISSN:0100-4042
1678-7064
DOI:10.1590/S0100-40422012000300034