Corrosion Resistant Nitride Coatings

9526411布朗最近的研究表明，氮化锆可以保护不锈钢免受海水腐蚀。这种效应似乎是由于一层薄薄的氮化物自然转化为水合氧化锆所致。根据SGER奖，将对各种其他耐火氮化物作为腐蚀防护涂层的潜在用途进行研究。将构建普尔拜克斯图，并从那些在海水的pH值和开放电位水平下具有稳定氧化物或水合氧化物的候选材料中选择进行测试的材料。选定的氮化物涂层将用等离子弧法沉积，并用电化学技术测试其耐蚀性。这一结果可能使用更环保的氮化物涂层取代铬酸盐转化涂层成为可能。***

9526411 Brown Recent studies have shown that zirconium nitride can protect stainless steel against seawater corrosion. It appears that the effcct is due to natural conversion of a thin layer of the nitride to hydrated zirconium oxide. Under an SGER award a study will be made of various other refractory nitrides for their potential use as corrosion protection coatings. Pourbaix diagrams will be constructed and candidate materials for testing will be chosen from those that have stable oxides or hydrated oxides at the pH and open potential levels of seawater. The selected nitride coatings will be deposited by plasma arc methods and tested for corrosion resistance by electrochemical techniques. The results may make it possible to replace chromate conversion coatings with the environmentally more benign nitride coatings. ***