Development of Fe-Ni-W alloys for steel parts coverings

Q4 Environmental Science

Scopus: Journal of East African Ornithology Pub Date : 2019-05-31 DOI:10.3303/CET1974199

C. Z. Castelli, A. F. Neto

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引用次数: 0

Abstract

The metallic coatings have their importance in the protection of structures against corrosion, gaining relevance as they bring financial benefits to avoid contamination, loss of efficiency, accidents, among other undesirable and costly situations. Electrodeposition is a mechanism used for the application of metallic coatings, and has been widely used industrially for Chromium alloys, which end up being harmful to the environment because of its carcinogenic nature. Thus, this work has as main objective to develop corrosion-resistant Fe-Ni-W alloys, evaluating process parameters such as electrical current density, cathodic rotation and electrolytic bath temperature. The study of the influence of these parameters on the electrodeposition of Fe-Ni-W contemplated the efficiency and rate of deposition. The electrodeposition tests were carried out on previously treated carbon steel substrates, using electrolytic baths with pH adjusted according to a metal speciation study and the application of electric current with the aid of a potentiostat. Fe-Ni-W alloys were characterized by Scanning Electron Microscopy (MEV) with X-ray Dispersive Energy Detector (EDS). The maximum deposition efficiency achieved was 50%. The compositions of Iron and Nickel in the alloy were influenced by variations in temperature and cathodic rotation, with the percentage of Iron being around 40% when using the temperature of 25 oC and the rotation of 15 rpm.

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钢件覆盖层用Fe-Ni-W合金的研制

金属涂层在保护结构免受腐蚀方面具有重要意义，因为它们带来了经济效益，避免了污染、效率损失、事故以及其他不希望的和昂贵的情况。电沉积是一种用于金属涂层应用的机制，并已在工业上广泛用于铬合金，由于其致癌性质，铬合金最终对环境有害。因此，本工作的主要目标是开发耐腐蚀的Fe-Ni-W合金，评估电流密度、阴极旋转和电解槽温度等工艺参数。研究这些参数对Fe-Ni-W电沉积的影响考虑了沉积的效率和速率。电沉积测试是在预先处理过的碳钢基底上进行的，使用根据金属形态研究调节pH的电解槽，并在恒电位仪的帮助下施加电流。用扫描电子显微镜（MEV）和X射线能谱仪（EDS）对Fe-Ni-W合金进行了表征。实现的最大沉积效率为50%。合金中铁和镍的成分受到温度变化和阴极旋转的影响，当使用25℃的温度和15 rpm的旋转时，铁的百分比约为40%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Scopus: Journal of East African Ornithology Environmental Science-Ecology

CiteScore

0.60

自引率

0.00%

发文量

期刊介绍： Journal of East African Ornithology has been published since 1977 by the Bird Committee of the East Africa Natural History Society. Originally titled Scopus, the addition of Journal of East African Ornithology began with our January 2018 issue. The journal is published Open Access twice a year, typically in January and July. Authors retain copyright and their work is licensed under the Creative Commons Attribution 4.0 International License. Our copyright and licensing agreement only applies from January 2018 onwards, and does not apply to previously published issues. Users have the right to read, download, copy, distribute, print, search, or link to the full texts of these articles.