Journal
SURFACE & COATINGS TECHNOLOGY
Volume 448, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2022.128934
Keywords
Ni-Fe-P coating; Mg-Al LDHs; Mechanical properties; Corrosion resistance
Funding
- National Natural Science Foundation of China [51774245]
- Southwest Petroleum University [2021CXYB25]
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Ni-Fe-P/Mg-Al layered double hydroxide (LDH) composite coatings with high corrosion and wear resistance were prepared. The uniform distribution of Mg-Al LDH nanosheets in the composite coating enhanced the wear resistance of the Ni-Fe-P matrix.
Ni-Fe-P/Mg-Al layered double hydroxide (LDH) composite coatings with high corrosion and wear resistance were prepared by electroless deposition. A series of test methods was used to comprehensively evaluate the crystal structure, surface morphology, element composition, roughness of the composite coating. The anti-wear and anti-corrosion performances of Ni-Fe-P/Mg-Al LDH (the following are all expressed as Ni-Fe-P/LDH) composite coatings were investigated. The deposition mechanism of the Ni-Fe-P/LDH alloy was rationalised. The results show that the Mg-Al LDH nanosheets were uniformly distributed in the Ni-Fe-P coating due to ion adsorption. The corrosion potential of Ni-Fe-P coatings in 3.5 wt% NaCl solution at 25 degrees C was 0.458 V vs. SCE, while the corrosion potential of Ni-Fe-P/LDH (0.4 g L-1) was 0.334 V vs. SCE. The coating shows adhesive wear during the friction test. The wear resistance of the Ni-Fe-P/LDH composite coating was much higher than that of the Ni-Fe-P coating. The two-dimensional lamellar nanomaterial LDH was good reinforcement phases for the Ni-Fe-P matrix.
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