| QI Peng-fei,LIN Bing,QU Jian-bo,MENG Lin,ZHANG Hai-long,ZHENG Hong-peng,WANG Ying-ying,TANG Jun-lei,LI Hong-ying.#$NP A Review:The Application of Hydrogels in the Field of Corrosion Protection[J],52(4):100-111 |
| #$NP A Review:The Application of Hydrogels in the Field of Corrosion Protection |
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| DOI：10.16490/j.cnki.issn.1001-3660.2023.04.007 |
| KeyWord:hydrogels preparation porous structure stimulus responsiveness corrosion protection |
| Author | Institution |
| QI Peng-fei |
School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu , China |
| LIN Bing |
School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu , China |
| QU Jian-bo |
AECC Chengdu Engine Co., Ltd., Chengdu , China |
| MENG Lin |
No.2 Oil Production Plant of Xinjiang Oilfield Company, Xinjiang Karamay , China |
| ZHANG Hai-long |
School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu , China |
| ZHENG Hong-peng |
School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu , China |
| WANG Ying-ying |
Key Laboratory of Optoelectronic Chemical Materials and Devices Ministry of Education, Jianghan University, Wuhan , China |
| TANG Jun-lei |
School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu , China |
| LI Hong-ying |
AECC Chengdu Engine Co., Ltd., Chengdu , China;Northwestern Polytechnical University, Xi'an , China |
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| Abstract: |
| Due to its unique water-containing cross-linked network structure, the hydrogel material has excellent hydrophilic, lubricating, wear-resistant, biocompatible and other characteristics. And the hydrogel material is one of the rapidly developing polymer materials in recent years. Functional hydrogel materials are widely used in biomedical engineering fields such as drug delivery, soft robotics, implantable organs and sensors. Then, in the field of corrosion protection, the unique properties of hydrogel material have gradually attracted the attention of scholars and the hydrogel becomes one of the emerging corrosion protection materials. In this paper, the main preparation methods of chemical cross-linking method and physical cross-linking method are compared. And the structure and properties of the hydrogel materials prepared by the two methods are compared in the paper. In this paper, the unique properties of hydrogel materials and their application potential in the field of corrosion protection are analyzed.The hydrogel prepared by chemical crosslinking has good stability, high mechanical strength, good wear resistance and antifouling properties. Then it can prepare marine antifouling coatings with excellent performance. The surface of medical equipment and marine ships is often prone to a layer of oil or organic matter, which allows microorganisms to multiply and accumulate here to form a microbial mucous membrane. The metabolites of microorganisms are often acidic and can cause corrosion of metal substrates. However, due to the good hydrophilic and oleophobic properties of hydrogels, it is difficult for oil stains to adhere to the surface of the hydrogel coating, which can reduce the corrosion of metals by microorganisms. Therefore, the good hydrophilic and oleophobic properties, low friction and self-healing properties of functional hydrogels are often used to prepare hydrogel coatings for marine anti-fouling-anti-corrosion coatings, mechanical skins and oil-water separation membranes. The hydrogel prepared by physical cross-linking has a three-dimensional network space structure inside that can be loaded with corrosion inhibitors. There are a large number of dynamic reversible bonds inside hydrogel, so the hydrogel has environmental responsiveness. The hydrogel can change its swelling with changes in environmental pH and temperature. Thereby it can change the release rate of the corrosion inhibitor loaded in the hydrogel. Compared with traditional solid corrosion inhibitors and liquid corrosion inhibitors, intelligent corrosion inhibitors have longer-lasting corrosion protection performance on metals and they have good application prospects. According to the unique properties of hydrogel materials, this paper focuses on analyzing the application status of hydrogel materials in the field of corrosion protection, and it analyzes the research prospects. At present, the preparation of hydrogel coatings usually goes through the steps of surface pretreatment, preparation of pre-gel solution, cross-linking and curing, etc. The hydrogel can be coated on substrates of different materials and shapes. Most of the hydrogel coatings have low friction, high wear resistance and oil resistance. Through different treatment methods, the hydrogel coating can have certain properties such as self-healing and environmental responsiveness.Functional hydrogels are responsive to environmental stimuli, and it can change the degree of self-swelling with changes in environmental pH, temperature, etc. Thereby the hydrogel can change the release rate of the corrosion inhibitor loaded in the hydrogel. At present, there are many researches on pH-sensitive intelligent corrosion inhibitors. Photosensitive and heat-sensitive intelligent corrosion inhibitors still need to be further developed. The use of hydrogel in combination with corrosion inhibitor has significant anti-corrosion performance on metals, which presents a new possibility for the development direction of anti-corrosion coatings. |
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