Corrosion study of nickel for alkaline water electrolysis

A study of the behaviour of nickel in the conditions of advanced electrolysis (130–180°C—40% KOH) shows the detrimental effect of oxygen in general corrosion. Corrosion can be limited by restricting sulfur content in nickel. No stress corrosion cracking is observed with nickel in KOH. Nickel appears to be more sensitive to cathodic hydrogen embrittlement than to gaseous hydrogen embrittlement.