The Effect of Cathodic Chrome Embedding in a Zinc Coating on Protection Properties

IF 0.5 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Inorganic Materials: Applied Research Pub Date : 2024-10-09 DOI:10.1134/S207511332470120X

I. S. Pankratov, N. D. Solovyova

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Abstract

The effect of cathodic embedding chromium into zinc coating layers is analyzed from the standpoint of change in corrosion resistance. The zinc is deposited from electrolytes of various compositions on electrodes made of St3 steel grade. Grade TsO zinc is used as anode. The preliminary treatment of steel electrode involves treating the surface in the prephase potentiostatic embedding (PPD) mode at a potential 50 mV more positive than equilibrium zinc potential E_eq of the working electrolyte for 5 min. The zinc coating layer is deposited in potentiostatic mode at a potential of –1.20 V relative to the silver chloride reference electrode. The introduction of chromium into the electrodeposited zinc coating is made from electrolytes containing a trivalent chromium salt. The results of X-ray fluorescence analysis of the components of working electrodes after cathodic introduction of chromium, as well as the morphology of the surface formed, are explored using the scanning electron microscopy indicating the presence of chromium in the coating and its effect on the structure. The corrosion resistance of zinc coating layers modified through cathodic introduction of chromium at potentials of –1.05 and –1.10 V for 5 min is better than in chromated zinc.

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阴极铬嵌入锌涂层对保护性能的影响

从耐腐蚀性变化的角度分析了阴极将铬嵌入锌镀层的影响。锌从不同成分的电解液中沉积在 St3 钢级的电极上。TsO 级锌用作阳极。钢电极的初步处理包括：在比工作电解液的锌平衡电位 Eeq 正 50 mV 的电位下，以预相位静电位嵌入（PPD）模式处理表面 5 分钟。锌镀层在相对于氯化银参比电极 -1.20 V 的电位下以静电模式沉积。电沉积锌镀层中铬的引入是通过含有三价铬盐的电解液进行的。利用扫描电子显微镜对阴极引入铬后工作电极成分的 X 射线荧光分析结果以及形成的表面形态进行了研究，表明了铬在涂层中的存在及其对结构的影响。在-1.05 和-1.10 V 的电位下阴极引入铬 5 分钟后，锌镀层的耐腐蚀性能比铬化锌更好。

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来源期刊

Inorganic Materials: Applied Research Engineering-Engineering (all)

CiteScore

0.90

自引率

0.00%

发文量

199

期刊介绍： Inorganic Materials: Applied Research contains translations of research articles devoted to applied aspects of inorganic materials. Best articles are selected from four Russian periodicals: Materialovedenie, Perspektivnye Materialy, Fizika i Khimiya Obrabotki Materialov, and Voprosy Materialovedeniya and translated into English. The journal reports recent achievements in materials science: physical and chemical bases of materials science; effects of synergism in composite materials; computer simulations; creation of new materials (including carbon-based materials and ceramics, semiconductors, superconductors, composite materials, polymers, materials for nuclear engineering, materials for aircraft and space engineering, materials for quantum electronics, materials for electronics and optoelectronics, materials for nuclear and thermonuclear power engineering, radiation-hardened materials, materials for use in medicine, etc.); analytical techniques; structure–property relationships; nanostructures and nanotechnologies; advanced technologies; use of hydrogen in structural materials; and economic and environmental issues. The journal also considers engineering issues of materials processing with plasma, high-gradient crystallization, laser technology, and ultrasonic technology. Currently the journal does not accept direct submissions, but submissions to one of the source journals is possible.