Effect of inorganic silicate sealing treatment on corrosion behaviour for HVAF sprayed Fe-based amorphous coatings
Source abstract
Abstract
Sealing treatment is an effective, environmentally friendly, and economical coating surface modification technology. To clarify the inorganic silicate sealing mechanism and concentration dependence on corrosion behaviour, HVAF-sprayed Fe-based amorphous metallic coatings (AMCs) were sealed by Na2SiO3 solution with various concentrations, and their microstructure, electrochemical performance, and surface chemistry were characterised in detail. The results showed that Na2SiO3, in the form of a silicon-oxygen bond (Si-O), could effectively bond with the coating surface inside the pore defects. In addition, the optimal concentration was proved to be 1 mol/L, and the corresponding passivation current density could be reduced to (2.38 ± 0.33) × 10−6 A/cm2, which was an order of magnitude lower than that of as-sprayed coating. This was due to the incomplete filling of the sealant at lower concentrations and the release of water vapour at higher concentrations. This work aims to provide guidance for the practical application of silicate sealing treatment.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Corrosion Behavior and Inhibition · High-Temperature Coating Behaviors · Electrodeposition and Electroless Coatings
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Materials Science and Engineering, Northeastern University, Shenyang, P. R. People’s Republic of China
Shenyang National Laboratory for Materials Science, Institute of Metal Research, CAS, Shenyang, P. R. People’s Republic of China
School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, P. R. People’s Republic of China
Funding
National Natural Science Foundation of China · Key Research Program of the Chinese Academy of Sciences · National Key Research and Development Program of China · Key Research & Development Plan of Jiangxi Province
References (38)
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