Comparison of the corrosion inhibition efficiencies of the ATMP‐molybdate system and the ATMP‐molybdate‐Zn2+ system

Susai Rajendran (Department of Chemistry, GTN Arts College (Autonomous), Dindigul, Tamilnadu, India)
B.V. Apparao (Department of Chemistry, Regional Engineering College, Warangal, Andhrapradesh, India)
V. Periasamy (Department of Chemistry, Gandhigram Rural Institute, Gandhigram, India)
G. Karthikeyan (Department of Chemistry, Gandhigram Rural Institute, Gandhigram, India)
N. Palaniswamy (Corrosion Science and Engineering Division, Central Electrochemical Research Institute, Karaikudi, Tamilnadu, India)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Publication date: 1 April 1998

Abstract

The formulation consisting of 50ppm ATMP and 300ppm MoO42‐ had only 32 per cent efficiency in inhibiting the corrosion of mild steel immersed in a neutral aqueous environment containing 60ppm C1, whereas the ATMP (50ppm) ‐ MoO42‐ (300ppm) ‐ Zn2+ (50ppm) system had 96 per cent inhibition efficiency. The lower inhibition efficiency in the former case was due to the dissolution of the protective film formed on the metal surface, and getting precipitated in the bulk of the solution; this system controlled the anodic reaction only. The latter system controlled both the anodic and cathodic reactions; the dissolution of the protective film formed on the metal surface was reduced to a greater extent.

Keywords

Citation

Rajendran, S., Apparao, B., Periasamy, V., Karthikeyan, G. and Palaniswamy, N. (1998), "Comparison of the corrosion inhibition efficiencies of the ATMP‐molybdate system and the ATMP‐molybdate‐Zn2+ system", Anti-Corrosion Methods and Materials, Vol. 45 No. 2, pp. 109-112. https://doi.org/10.1108/00035599810198750

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MCB UP Ltd

Copyright © 1998, Company

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