Artigo
Corrosão do aço-carbono: uma abordagem do cotidiano no ensino de química
Carbon steel corrosion: an everyday approach for chemistry teaching
Registro en:
Quimica Nova. Sao Paulo: Soc Brasileira Quimica, v. 38, n. 2, p. 293-296, 2015.
0100-4042
10.5935/0100-4042.20140313
S0100-40422015000200293
WOS:000353158400022
S0100-40422015000200293.pdf
9386730770147178
Autor
Silva, Marcos V. F. [UNESP]
Pereira, Marinalda C. [UNESP]
Codaro, Eduardo N. [UNESP]
Acciari, Heloisa A. [UNESP]
Resumen
In this paper, two simple ways of evaluating carbon steel sheet corrosion in a hydrochloric acid solution were presented as an experimental proposal for corrosion teaching. The first method is based on direct measurements of mass before and after corrosion tests. The second approach follows the principle of visual colorimetry by which soluble corrosion products are transformed into red complexes allowing monitoring of the products'concentration according to increases in solution color intensity. Both methods proved able to determine the corrosion rate. Univ Estadual Paulista, UNESP, Fac Engn, Dept Fis &Quim, BR-12516410 Guaratingueta, SP, Brazil Departamento de Física e Química, Faculdade de Engenharia, Universidade Estadual Paulista, UNESP, Campus de Guaratinguetá, 12516-410 Guaratinguetá – SP, Brasil