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The reason for not chroming highly stressed parts is that the chrome is very brittle and any flexing of that part will likely crack the very hard chrome and allow that crack to easily spread into the base metal.If I'm not mistaken NHRA banned chrome on cage and suspension parts many years ago for just that reason.
I'm always up for an education update.
OK I hear your theory and completely understand hydrogen embrittlement but chroming is done at a much lower temp than welding so why or how would the base metal be effected by the hydrogen gas in the plating process? Just asking and would be very interested in reading more on the subject. Can you provide any links to more info?