Effect of ultrasonication and Na 2 MoO 4 content on properties of electroless Ni–Mo–P coatings
Source abstract
Abstract
Electroless Ni–Mo–P composite coatings with or without ultrasonic field were successfully deposited. The Sodium molybdate concentration was changeable to receive various Mo and P contents. Compared with the absence of ultrasound field, the coatings obtained smoother surface and higher Mo and P contents. The microhardness was determined by Vickers diamond indentation. The results showed that the hardness improved with increasing molybdenum and phosphorus content. The sample revealed the optimum hardness (886 HV) as it possesses 8 wt-% of Mo and 14 wt-% of P. Furthermore, the coatings exhibited higher hardness under ultrasound field. The corrosion resistance was analysed by potentiodynamic polarisation. The results showed that the corrosion resistance was enhanced in the increase of molybdenum. The sample with the highest Mo content (10 wt-%) showed the best corrosion resistance (5.81 μA cm −2 ). In addition, the coatings with ultrasound field have an influence on improving the corrosion resistance of the coating.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Electrodeposition and Electroless Coatings · Corrosion Behavior and Inhibition · Hydrogen embrittlement and corrosion behaviors in metals
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, 201418, People's Republic of China
State Key Laboratory of Polyolefins and Catalysis, Shanghai Key Laboratory of Catalysis Technology for Polyolefins, Shanghai Research Institute of Chemical Industry Co., Ltd., Shanghai, People's Republic of China
Funding
National Natural Science Foundation of China · Shanghai Association for Science and Technology Achievements Transformation Alliance Program · Shanghai Excellent Technology Leaders Program · Shanghai Leading Talent Program
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