The effect of oxalic acid (OA) on corrosion resistance of carbon steel in sulphuric acid pH=2.5‐6.0 solutions containing 10−7‐10−3M OA was investigated by means of potentiodynamic polarisation measurements and immersion tests. The results suggest that OA is a good corrosion inhibitor for carbon steel, exhibiting inhibition efficiencies (IE) ranging from 50 to 85 per cent in dilute 10−7‐10−5M OA solutions of pH>3.0, whereas for pH≤3.0 solutions, an increase in corrosion rate was found. Non‐accelerated experiments (weight loss tests) carried out by immersing carbon steel specimens into OA‐containing solutions during at least 6 h revealed only positive IE values, regardless of both solution pH and OA content. The results were explained considering the solution composition as function of pH.
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April 01 2004
The effect of oxalic acid on the corrosion of carbon steel Available to Purchase
C. Giacomelli;
C. Giacomelli
Department of Chemistry, Universidade Federal de Santa Catarina, Santa Catarina, Brazil
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F.C. Giacomelli;
F.C. Giacomelli
Department of Chemistry, Universidade Federal de Santa Catarina, Santa Catarina, Brazil
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J.A.A. Baptista;
J.A.A. Baptista
Department of Chemistry, Universidade Federal de Santa Catarina, Santa Catarina, Brazil
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A. Spinelli
A. Spinelli
Department of Chemistry, Universidade Federal de Santa Catarina, Santa Catarina, Brazil
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Publisher: Emerald Publishing
Online ISSN: 1758-4221
Print ISSN: 0003-5599
© Emerald Group Publishing Limited
2004
Anti-Corrosion Methods and Materials (2004) 51 (2): 105–111.
Citation
Giacomelli C, Giacomelli F, Baptista J, Spinelli A (2004), "The effect of oxalic acid on the corrosion of carbon steel". Anti-Corrosion Methods and Materials, Vol. 51 No. 2 pp. 105–111, doi: https://doi.org/10.1108/00035590410523193
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