publication . Article . 2004

Hydrogen embrittlement of high strength steel electroplated with zincâ  cobalt allo

Hillier, Elizabeth M. K.; Robinson, M. J.;
Open Access
  • Published: 03 Mar 2004
  • Publisher: Elsevier Science B.V., Amsterdam.
  • Country: United Kingdom
Slow strain rate tests were performed on quenched and tempered AISI 4340 steel to measure the extent of hydrogen embrittlement caused by electroplating with zincâ  cobalt alloys. The effects of bath composition and pH were studied and compared with results for electrodeposited cadmium and zincâ  10%nickel. It was found that zincâ  1%cobalt alloy coatings caused serious hydrogen embrittlement (EI 0.63); almost as severe as that of cadmium (EI 0.78). Baking cadmium plated steel for 24 h at 200 à °C gave full recovery of mechanical properties but specimens plated with zincâ  1%cobalt and then baked still failed in 89% of the time of unplated controls. ...
Medical Subject Headings: inorganic chemicals
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