Corrosion of copper plated NST60Mn and NST50 steels in NaCl, H2SO4 and NaOH solutions

The corrosion characteristics of copper-electroplate on two Nigeria standard steels (NST60Mn and NST50) in three corrosive media (0.1M NaOH, 3.5M NaCl, 0.1M H2SO4 solutions) were studied. NST60Mn and NST50 steels substrates were plated in acid sulphate bath. The results of copper corrosion study in three corrosive media after 30 days revealed that copper plated steels have lower corrosion rates than the naked as-received steels whereas the copper-coated steels have 3.06 x 10-3, 6.46 x 10-4, and 1.2 x 10-3 corrosion rates (mgmm-2day-1) in 3.5M NaCl, 0.1M H2SO4, and 0.1M NaOHrespectively. These will produce a good combination with some other more protective metal plating over coats when used in these environments.

Author(s): Olawale O. Ajibola, Funso Kolawole and Abdullahi O. Adebayo

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