Artigo
Uma experiência didática de corrosão usando colorimetria visual
Fecha
2012-01-01Registro en:
Química Nova. Sociedade Brasileira de Química, v. 35, n. 3, p. 634-637, 2012.
0100-4042
10.1590/S0100-40422012000300034
S0100-40422012000300034
WOS:000303071700034
S0100-40422012000300034.pdf
7539097260489375
0000-0002-1648-2281
Autor
Universidade Estadual Paulista (Unesp)
Resumen
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.