Studying the effect of multicomponent nano-coating alloy on hydrogen embrittlement of AISI 1018 steel by gas-phase process

Z. Ali, Zainab; S. Mahdi, Baha; D. Althamer, Ameen

doi:10.30772/qjes.v15i1.815

	Studying the effect of multicomponent nano-coating alloy on hydrogen embrittlement of AISI 1018 steel by gas-phase process
Al-Qadisiyah Journal for Engineering Sciences
Volume 15, Issue 1, March 2022, Pages 67-72 PDF (653.96 K)
DOI: 10.30772/qjes.v15i1.815
Authors
Zainab Z. Ali^* ¹; Baha S. Mahdi²; Ameen D. Althamer²
¹Production and Metallurgy Department, University of Technology, Baghdad, Iraq.
²Production and Metallurgy Department, University of Technology, Baghdad, Iraq
Abstract
The present study is attempted to investigate the inﬂuence of multicomponent Ni-alloy (BNi-2) on the hydrogen embrittlement (HE) behaviour of AISI 1018 steel by using cathodic protection and tensile test. The results show that the HE indexes (HEI) decrease notably when AISI 1018 steel is coated with BNi-2 alloy by DC sputtering process. This coating processes leads to decrease in HE susceptibility of the AISI 1018 steel, which can be rationalized to the enhancement in corrosion resistance and the decrease in hydrogen absorption of the AISI 1018 steel after coating. The tensile strengths of bared samples were decreased with increasing charging time until 24 hours when stable at values 350 MPa. while the coated samples showed an increasement in the tensile strength from 570 MPa to 750 MPa. stabilization in strength at value of 600 MPa was observed after exceeding 48 hours. Also, the tensile test for uncoated specimens indicated a clear reduction on the modulus of elasticity compared with other coated ones.
Keywords
Hydrogen embrittlement Tensile test DC sputtering BNi; 2 SEM

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