Abstract In the current study, amorphous nickel phosphorus graphene (Ni P G) composite coatings were electroplated on mild steel substrate. Coatings were electroplated from nickel sulphate bath containing phosphorus acid and exfoliated graphene in amounts of 50 mg/l, 100 mg/l, 150 mg/l, and 200 mg/l. Phase constitution, composition, surface morphology and corrosion parameters were investigated as a function of the graphene content. Experimental results exhibited that Ni P and Ni P G composite coatings possessed improved corrosion resistance than the mild steel substrate and addition of graphene enhanced the corrosion resistance performance when compared to the pristine coating. It was observed that an optimum exists with respect to the amount of graphene dispersed in the electrolyte bath for achieving high anti-corrosion property from the coating produced using the respective plating bath. Lower amount of graphene in dispersion produced uniform surface morphology which acted along with the graphene impermeability to yield high corrosion resistance performance. Higher quantity of graphene in dispersion, on the other hand, caused their agglomeration thus producing rough and defective surface morphology which along with non-uniform distribution of graphene yielded higher corrosion rates.

中文翻译：

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通过掺入石墨烯增强非晶态镍磷涂层的耐腐蚀性能

摘要 在目前的研究中，非晶镍磷石墨烯（Ni PG）复合涂层电镀在低碳钢基体上。涂层从含有磷酸和剥离石墨烯的硫酸镍浴电镀，其含量为 50 mg/l、100 mg/l、150 mg/l 和 200 mg/l。研究了作为石墨烯含量的函数的相构成、组成、表面形态和腐蚀参数。实验结果表明，Ni P 和 Ni PG 复合涂层比低碳钢基体具有更高的耐腐蚀性能，并且与原始涂层相比，石墨烯的添加增强了耐腐蚀性能。观察到，对于分散在电解质浴中的石墨烯的量而言存在最佳值，以从使用相应镀浴产生的涂层实现高抗腐蚀性。分散体中较低量的石墨烯产生均匀的表面形态，其与石墨烯的不渗透性一起产生高耐腐蚀性能。另一方面，分散中较高量的石墨烯导致它们团聚，从而产生粗糙和有缺陷的表面形态，随着石墨烯的不均匀分布产生更高的腐蚀速率。