Evaluation of wear and corrosion resistance in acidic and chloride solutions of Cathodic Arc PVD chromium nitride coatings on untreated and plasma nitrided AISI 4140 steel

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology Pub Date : 2024-10-30 DOI:10.1016/j.surfcoat.2024.131476

A. Justina Maskavizan , Juan Pablo Quintana , Eugenia L. Dalibón , Adriana B. Márquez , Sonia P. Brühl , Silvia B. Farina

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引用次数: 0

Abstract

Chromium nitride ceramic like coatings are well known for their hardness and wear resistance, especially under severe conditions. When deposited on mild steel, nitriding is required for such applications to create a gradient hardness profile and improve the coating adhesion and the system's mechanical properties. Corrosion resistance is also necessary since these chromium coatings are recommended for applications in the plastic mould and injection industry. Therefore, in this work, the combination of a nitriding without white layer pretreatment and CrN coating was studied in a chloride and an acidic electrolyte, to asses if the diffusion layer also plays an important role as a corrosion protection treatment. Coating microstructure, adhesion to both nitrided and non-nitrided steel, wear resistance, and corrosion resistance in chloride and acidic media were evaluated. For comparison, bare and nitrided steel were also examined. Results indicated an improvement in the adhesion for the duplex treatment (nitriding + CrN). The CrN coating demonstrated a considerably lower coefficient of friction and wear rate compared to both non-nitrided and nitrided steel. Regarding corrosion, the iron nitride layer provides some protection in chloride environments; however, in acidic media, only the CrN coating plays a protective role. In both media, localized attack occurred at sites where the coating had defects, such as pores or pinholes through which the electrolyte comes into contact with the substrate. The duplex treatment proved to be the most effective surface treatment for AISI 4140, achieving excellent tribological properties, good adhesion, and high corrosion resistance in both neutral chloride and acidic solutions.

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未处理和等离子氮化 AISI 4140 钢上的阴极电弧 PVD 氮化铬涂层在酸性和氯化物溶液中的耐磨性和耐腐蚀性评估

氮化铬陶瓷涂层以其硬度和耐磨性而闻名，尤其是在严酷的条件下。在低碳钢上沉积时，需要进行氮化处理，以形成梯度硬度曲线，提高涂层的附着力和系统的机械性能。由于这些铬涂层被推荐用于塑料模具和注塑行业，因此耐腐蚀性也是必要的。因此，在这项工作中，我们研究了在氯化物和酸性电解液中将无白层预处理的氮化与 CrN 涂层相结合的方法，以确定扩散层是否也能发挥重要的防腐蚀处理作用。对涂层的微观结构、与氮化钢和非氮化钢的附着力、耐磨性以及在氯化物和酸性介质中的耐腐蚀性进行了评估。为了进行比较，还对裸钢和氮化钢进行了检测。结果表明，双相处理（氮化 + CrN）的附着力有所提高。与未氮化钢和氮化钢相比，CrN 涂层的摩擦系数和磨损率都大大降低。在腐蚀方面，氮化铁层在氯化物环境中提供了一定的保护；但在酸性介质中，只有铬N涂层起到了保护作用。在这两种介质中，局部腐蚀都发生在涂层有缺陷的地方，如电解液与基体接触的孔隙或针孔。事实证明，双相处理是 AISI 4140 最有效的表面处理方法，在中性氯化物和酸性溶液中都能获得优异的摩擦学性能、良好的附着力和高耐腐蚀性。

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来源期刊

Surface & Coatings Technology 工程技术-材料科学：膜

CiteScore

10.00

自引率

11.10%

发文量

921

审稿时长

19 days

期刊介绍： Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.