抄録
In order to find out the factors significantly affecting the result of Korrodkote test of double nickel-chromium coatings, a series of experiments was carried out by means of experimental design. Statistical analysis of the result has led to several interesting conclusions.
For example:
1) Type of semibright and bright nickel plating bath can be important factors. Among sulfer-free semi bright nickel baths, the coumarin containing bath gave better result compared with the Watts' bath without addition agent, and among bright nickel baths, the TNS containing bath was better than the saccharin containing one.
2) In bright nickel plating, the deposit with higher current density was more corrosion resistant.
3) Thickness of nickel deposit showed more significant effect on corrosion resistivity than that of copper, the latter being almost insignificant.
