Shen Xiaochao, Wang Jiali, Xin Gang
Faculty of Chemical, Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024, China.
ACS Omega. 2021 Nov 24;6(48):33122-33129. doi: 10.1021/acsomega.1c05490. eCollection 2021 Dec 7.
Composite layers of Ni-P and PVDF were obtained using surfactants to enhance the corrosion resistance of the fluoride ion. The zeta potential of PVDF particles was changed with the surfactants (cationic, anionic, and nonionic). The effects of the zeta potential of PVDF particles on the particle distribution, morphology, composition, hydrophobicity, and corrosion resistance of the composite layers were studied using the different types of surfactants. The deposition behaviors of the Ni-P layer and PVDF particles strongly depended on the zeta potential of PVDF particles. Using anionic surfactants, especially CHSONa (SDS), the zeta potential of PVDF particles was -30.6 mV. The densification and uniformity of the composite layers with a higher amount of PVDF particles were achieved, which resulted in the superior resistance to fluoride ion corrosion. After heating at 180 °C, the PVDF particles were melted, spread, and filled into the pores of the composite layers, which led to the further enhanced corrosion resistance. It was demonstrated that the zeta potential of PVDF particles affected the dispersion, stability, and codeposition with electroless nickel, which resulted in the uniform and dense composite layers and enhanced the corrosion resistance of the fluoride ion.
使用表面活性剂获得了Ni-P和PVDF复合层，以提高对氟离子的耐腐蚀性。PVDF颗粒的zeta电位随表面活性剂（阳离子、阴离子和非离子）而变化。使用不同类型的表面活性剂研究了PVDF颗粒的zeta电位对复合层的颗粒分布、形态、组成、疏水性和耐腐蚀性的影响。Ni-P层和PVDF颗粒的沉积行为强烈依赖于PVDF颗粒的zeta电位。使用阴离子表面活性剂，尤其是CHSONa（SDS）时，PVDF颗粒的zeta电位为-30.6 mV。获得了具有较高PVDF颗粒含量的复合层的致密性和均匀性，这导致了对氟离子腐蚀的优异抗性。在180°C加热后，PVDF颗粒熔化、铺展并填充到复合层的孔隙中，这导致耐腐蚀性进一步增强。结果表明，PVDF颗粒的zeta电位影响了其与化学镀镍的分散性、稳定性和共沉积，从而形成了均匀致密的复合层，并提高了对氟离子的耐腐蚀性。
