Effect of Phosphorus Content on Hydrogen Embrittlement for High Strength Steel Treated with Electroless Ni–P Plating

Hydrogen embrittlement of SK85 high-strength steel sheets was evaluated through a three-point bending test. The effects electroless Ni–P plating and Ni electroplating on hydrogen were examined with respect to the permeability plated films. On morrow plating, indicates high degree embrittlement, irrespective phosphorus content in film. However, is further suppressed than that which can be attributed excellent diffusing ability electroplating. These results demonstrate film an important factor for embrittlement. present surface visualized by employing microprint technique, corresponding reveal dependent crystal structure. Furthermore, pits become route emission.