The effect of Zn coating layers on the hydrogen embrittlement of hot dip galvanized twinning induced plasticity steel
Abstract The effect of Zn coating layers on hydrogen embrittlement (HE) was investigated using hot dip galvanized (HDG) twinning induced plasticity (TWIP) steel. The Zn coating layers consisted of an e Zn layer and Fe Zn intermetallic layers of z and d without o. H was trapped particularly at the z layer without Zn H compounds. The activation energies of H desorption from the d and z layers were 60.0 kJ mol 1 and 75.4 kJ mol 1 respectively. The H charged HDG_TWIP steel did not reveal HE due to the intermetallic layers, which are exceptionally brittle even when H is not enriched.