Influence of structure and TiAl3/TiAlN intermetallic coatings on the corrosion behavior of austenics steels

2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) Pub Date : 2016-09-01 DOI:10.1109/DEIV.2016.7764019

E. Vardanyan, I. Yagafarov, K. Ramazanov, A. Khamzina, N. A. Amirhanova

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Abstract

Corrosive attack is one of the most frequent reasons of machine components failure. As is known part service properties substantially depend on surface layer state and structure, obtained after complete processing. Various coatings are widely used to improve service properties. It is also known that an intermetallic compounds are beneficial in many aspects. Ti-Al coatings were compared in the studied. The coatings were deposited by vacuum arc plasma. An intermetallic compound was synthesized during the Ti-Al coating deposition. Phase composition and corrosion behavior of the coatings were investigated by means X-ray diffraction and electrochemical tests. Potentiodynamic curves in corrosive medium were made before and after coating deposition on heat-resistant high alloy steel. Corrosion currents were calculated using the potentiodynamic curves. General regularities of the steel corrosion were established using the potentiodynamic curves. Interdependence between surface state phase composition and corrosion rate was studied.

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组织和TiAl3/TiAlN金属间化合物涂层对奥氏体钢腐蚀行为的影响

腐蚀腐蚀是造成机械部件故障最常见的原因之一。众所周知，零件的使用性能在很大程度上取决于表面层的状态和结构，这是在完全加工后获得的。各种涂料被广泛用于改善使用性能。众所周知，金属间化合物在许多方面都是有益的。对钛铝涂层进行了对比研究。涂层采用真空电弧等离子体沉积。在Ti-Al涂层沉积过程中合成了一种金属间化合物。通过x射线衍射和电化学测试研究了镀层的相组成和腐蚀行为。对耐热高合金钢进行了涂层沉积前后在腐蚀介质中的电位变化曲线的研究。采用动电位曲线计算腐蚀电流。利用动电位曲线建立了钢腐蚀的一般规律。研究了表面态相组成与腐蚀速率的相互关系。

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2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)

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