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首页> 外文期刊>Transactions of the Institute of Metal Finishing: The International Journal for Surface Engineering and Coatings >Comparison of the corrosion behaviour of laser-annealed Ni-P and Ni-Mo-P deposits in H2SO4 and NaCl solutions
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Comparison of the corrosion behaviour of laser-annealed Ni-P and Ni-Mo-P deposits in H2SO4 and NaCl solutions

机译：比较H2SO4和NaCl溶液中激光退火的Ni-P和Ni-Mo-P沉积物的腐蚀行为

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摘要

The corrosion behaviour of electroless amorphous Ni-P and Ni-Mo-P deposits before and after laser treatment was systemically compared using potentiodynamic polarisation and electrochemical impedance spectroscopy (EIS) techniques, and X-ray and SEM/EDS analysis and interferometry. EIS studies in 3.5 wt-% NaCl solution indicate that a suitable laser treatment can strongly improve the pitting corrosion resistance of the Ni-Mo-P deposit to Cl-attack compared with the Ni-P deposit and the best corrosion resistance of the Ni-Mo-P deposit appears at a laser scanning velocity of 12 mm s(-1). In 0.5 M H2SO4 solution, the corrosion mechanism of the Ni-Mo-P deposit is mainly associated with the dissolution of Mo from Ni-Mo solid solution. The as-plated Ni-Mo-P deposit exhibits better corrosion resistance than the Ni-P deposit, and this is true for the laser-treated Ni-Mo-P deposit at a laser scanning velocity <10 mm s(-1).
机译：使用电位动力学极化和电化学阻抗谱（EIS）技术，以及X射线和SEM / EDS分析和干涉法，系统地比较了化学非晶态Ni-P和Ni-Mo-P沉积物在激光处理前后的腐蚀行为。在3.5 wt％的NaCl溶液中进行的EIS研究表明，与Ni-P沉积物相比，适当的激光处理可以大大改善Ni-Mo-P沉积物对Cl-attack的抗点蚀性，并且Ni-P沉积物具有最佳的耐蚀性Mo-P沉积物以12 mm s（-1）的激光扫描速度出现。在0.5 M H2SO4溶液中，Ni-Mo-P沉积物的腐蚀机理主要与Mo从Ni-Mo固溶体中的溶解有关。电镀后的Ni-Mo-P沉积物比Ni-P沉积物具有更好的耐腐蚀性，这对于激光扫描速度<10 mm s（-1）的激光处理过的Ni-Mo-P沉积物来说确实如此。

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