Influence of the pulsed plasma treatment on the corrosion resistance of the low-alloy steel plated by Ni-based alloy

10th International School-Conference on Materials for Extreme Environment: Development, Production and Application

Dzhumaev, P.^1 ; Yakushin, V.^1 ; Kalin, B.^1 ; Polsky, V.^1 ; Yurlova, M.^1

National Research Nuclear University MEPhI, Moscow Engineering Physics Institute, Kashirskoe highway, 31, Moscow

115409, Russia^1

关键词: Corrosion mechanisms;    Homogeneous distribution;    Microcrystalline structures;    Nickel based alloy;    Preliminary treatment;    Pulsed plasma flows;    Pulsed plasma treatment;    Uniform corrosion;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/130/1/012040/pdf
DOI  :  10.1088/1757-899X/130/1/012040

来源: IOP

【 摘 要 】

This paper presents investigation results of the influence of high temperature pulsed plasma flows (HTPPF) treatment on the corrosion resistance of low-alloy steel 0.2C-Cr-Mn- Ni-Mo cladded by the rapidly quenched nickel-based alloy. A technique that allows obtaining a defect-free clad layer with a good adhesion to the substrate was developed. It is shown that the preliminary treatment of steel samples by nitrogen plasma flows significantly increases their corrosion resistance in the conditions of intergranular corrosion test in a water solution of sulfuric acid. A change of the corrosion mechanism of the clad layer from intergranular to uniform corrosion was observed as a result of sub-microcrystalline structure formation and homogeneous distribution of alloying elements in the plasma treated surface layer thus leading to the significant increase of the corrosion resistance.