| Abstract |
| CASS(copper accelerated acetic salt spray) and EC(electrolytic corrosion test) tests were performed in order to evaluate the resistance to corrosion of plated Ni-Cr and Ni-microporous Cr layers on Fe substrate. Compared with the conventional methods such as CASS, the electrochemical method, i.e. EC test showed the superiority in terms of test-time span and quantitative accuracy. Furthermore, EC test also offered the alternative method to be able to evaluate the resistance to corrosion of coatings by measuring the rest potentials of the coated layers on the substrate in the electrolyte during the off-time of EC cycles, comparing them with those of pure iron, nickel, and chromium. Results showed that although there is not much difference between CASS and EC tests in case of Ni-microporous Cr specimens during the short testing time span, EC test reflected the minute variation of currents and potentials, providing the faster and quantitative results than CASS test. Therefore, EC test method offers the much better results than the conventional method like CASS, in terms of evaluating the resistance to corrosion of the coated layers. (Received July 12, 2004) |
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| Key Words |
| CASS, EC, Rest potential, Bright Ni-microporous Cr plating |
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