Alloys containing nickel or co balt a nd as mu ch as 15 perce ni of phosphorus ha ve been electrodeposited fl'om solutions containing phosphites. The alloys are ha rd a nd may be further harde ne d by heat-treating at 400 0 C. The high-phosphorus ni ckel alloy is m ore resistant to attack by h ydrochl ori c acid than pure nickel deposits. The high-phos phorus alloys a re b ri ght as deposited , but t heir reflectivities a re lower than those of buffed coatings of pure nickel..
A process was developed for the deposition of aluminum from an ethereal solution of aluminum chloride and a metal hydride. The best deposits were obtained from an ethyl ether solution that was 2 to 3.M in aluminum chloride and 0.5 to 1.0M in lithium hydride. The deposits were quite ductile, and deposition rates of 0.025 to 0.05 mm per hour were possible. Deposits 0.5 to 0.75 mm thick were produced with hardnesses of from 37 to 97 Vickers.An investigation of the effect of various inorganic addition agents on the type of deposit produced from the fused aluminum bromide‐potassium bromide bath was made.
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