2020/03/11 by Jiankuan Li, Chong Sun, Morteza Roostaei +5
Engineering · Materials Science · #Corrosion Behavior and Inhibition #Electrodeposition and Electroless Coatings #Hydrogen embrittlement and corrosion behaviors in metals
paper · doi:10.5006/3371
crossref issued 2020/03/11 · crossref published 2020/03/11 · crossref published-online 2020/03/11 · openalex publication_date 2020/03/11 · crossref created 2020/03/12 · crossref published-print 2020/06/01 · crossref deposited 2025/03/18 · openalex created_date 2025/10/10 · crossref indexed 2026/07/29 · openalex updated_date 2026/08/01
The electrochemical corrosion behavior of Ni-P coating in 3.5 wt% NaCl solution-containing CO2 and H2S was investigated using electrochemical methods and surface characterization techniques. The results show that the presence of H2S can enhance the CO2 corrosion of Ni-P coated carbon steel by affecting both anodic and cathodic processes. The adsorbed layer only exists in the very early stage of corrosion and barely improves the anticorrosion performance of the coating. The formation of corrosion products (NiO and Ni3S2) renders temporary protection during immersion, but the addition of H2S accelerates the diffusion process at the electrolyte/coating interface and promotes the electrolyte penetration through the coating, causing severe localized corrosion and coating disbondment. A corrosion model is proposed to illustrate the corrosion and degradation process of Ni-P coated steel in the CO2/H2S/Cl− environment.