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Study on Corrosion Inhibition and Wetting Performance of Water-Based Cutting Fluid for 2A12 Aluminum Alloy

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  • (1.Haixi (Fujian) Institute, China Academy of Machinery Science and Technology Group, Sanmin 365500, China;2.Wuhan Research Institute of Materials Protection Co., Ltd.CAM, Wuhan 430030, China)

Received date: 2023-06-02

  Revised date: 2023-07-12

  Accepted date: 2023-08-15

  Online published: 2023-09-15

Abstract

In order to design and prepare water-based cutting fluid for 2A12 aluminum alloy to ensure no rust on the surface after machining,addition amounts of triethanolamine (TEA), dodecanedioic acid (DC12) and ethylenediaminetetraacetic acid (EDTA) in the formula were optimized by response surface methodology.The synergistic corrosion inhibition effect on 2A12 aluminum alloy was investigated,and the amidemodified vegetable oil (AMV-1) and self-emulsifying ester (SEE) were utilized to improve the anti-corrosive effect of the formula, and the surfactants were added to enhance the wetting performance of the formula system.At last, combined with infrared spectroscopy and molecular structure analysis, the structure-activity relationship of AMV-1 and SEE corrosion inhibition performance was clarified.Results showed that TEA, DC12 and EDTA were the significant factors affecting the corrosion of 2A12 aluminum alloy, and there was an interaction between TEA and DC12.The optimal addition amounts (mass fraction, the same below) were 11.10%, 1.70% and 0.44%, respectively.Adding 8.0%(mass fraction) AMV-1 and 2.0%(mass fraction) SEE could make the aluminum alloy surface free from corrosion and discoloration.Meanwhile, polyether L44 could improve the wetting performance of the formula, and the surface static contact angle decreased from 49.732° to 36.451° with the addition of 2.0%(mass fraction).AMV-1 and SEE formed a coordination compound protective film and a hydrophobic film on the surface of aluminum alloy, respectively, to achieve corrosion inhibition effect.

Cite this article

LI Yingpeng, ZHANG Yutao, JIANG Chunquan, TENG Xu, ZHAN Wen . Study on Corrosion Inhibition and Wetting Performance of Water-Based Cutting Fluid for 2A12 Aluminum Alloy[J]. Materials Protection, 2023 , 56(9) : 22 -29 . DOI: 10.16577/j.issn.1001-1560.2023.0208

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