Electrodeposition of low contraction chromium/molybdenum alloys using pulse-reverse plating. Final report

The use of modulated pulse periodic reverse(pulse- reverse) current to electrodeposit a low contraction (LC) chromium/ molybdenumalloy has been evaluated. When using one full pulse- reverseplating cycle, the percent molybdenumin the deposit increased almost 400 percent (from 1 to 4 percent) as the current in the reversecycle was increased from 0 to 10 amps. However, when the pulse reversecurrent was carried to six full plating cycles, the percent molybdenumin the deposit was not dependent upon the current and remained constant at about 1 percent. This is about the same percent molybdenumthat could be expected in direct current-plated LC chromium/ molybdenumalloy and about half the percent molybdenumthat could be expected in an on/off pulse-plated LC chromium/ molybdenumalloy.