Graphene Containing Composite Coatings as a Protective Coatings against Hydrogen Embrittlement in Quenching & Partitioning High Strength Steel

Abstract

Pure Ni and Ni-graphene coatings fabricated by reverse pulse electrodeposition were applied to protect quenching & partitioning (QP) steel as the substrate from hydrogen embrittlement (HE). The inhibitory effects of coatings on HE in steel were assessed by slow strain rate test (SSRT) after electrochemical hydrogen charging and hydrogen permeation test using the Devanathan-Stachurski (D-S) cells. According to the results of the total elongation loss Elloss and steady state permeation current I∞ as well as the diffusion coefficient D, it is suggested that the effect of pure Ni coatings on HE in QP steel was slight, whereas Ni-graphene coatings could act as a more effective protecting coatings against HE. Finally, the mechanisms affecting the performance of coatings on HE in QP steel were also discussed.

Development and Characterization of Anticorrosion and Antifriction Properties for High Performance Polyurethane/Graphene Composite Coatings

“…In recent years, it was reported that carbon derivatives, such as carbon nanotubes (CNTs) [16][17][18], graphene (Gr) and graphene oxide (GO) [19][20][21][22][23][24][25][26][27][28][29][30][31] can be used as anti-corrosion additives to organic coatings. Gr has attracted considerable attention owing to its extraordinary electrical and physical properties, especially its impermeable nature [32][33][34]. There are a number of studies showing that adding Gr and its derivatives to a polymer coating can enhance the corrosion performance of the coating [19][20][21][22][23][24][25][26][27][28][29][30][31].…”

MXene Coatings: Novel Hydrogen Permeation Barriers for Pipe Steels

“…To study the hydrogen permeation resistance of the MXene coatings, hydrogen permeation tests were performed with the aid of the Devanathan-Stachurski (D-S) cell [ 20 ] in which aqueous saturated calomel electrode (SCE) was the reference electrode, platinum foil was the counter electrode, and 0.2 mol/L NaOH was the electrolyte. Before the hydrogen permeation test was performed, a layer of nickel was plated on the uncoated side of the sample.…”

Electrochemical Corrosion Resistance and Electrical Conductivity of Three-Dimensionally Interconnected Graphene-Reinforced Cu Composites

“…Many studies have shown that graphene is impermeable to atomic hydrogen [36][37][38]. Therefore, the 3DIGN in 3Di Gr-Cu composite can function as an effective barrier to atomic hydrogen.…”