A sturdy PDMS-based multifunctional smooth coating with long-term corrosion resistance, anti-icing/deicing durability and self-cleaning performance

IF 6.9 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology Pub Date : 2026-03-01 Epub Date: 2026-01-29 DOI:10.1016/j.surfcoat.2026.133242

Yan Zhang , Ying Wang , Ningbo Hu , Lin Liu , Xiaobing Zhao , Yuanyuan Zhu , Ningyi Yuan , Jianning Ding

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Abstract

Poor corrosion resistance and susceptibility to ice accumulation at low temperature significantly limit the application of magnesium (Mg) alloy. It is crucial to develop a durable coating that offers long-term anti-corrosion and anti-icing/deicing properties for the protection of Mg alloy. In this study, a LDH (layered double hydroxide)-PDMS (polydimethylsiloxane)/SO (dimethyl silicone oil) smooth coating with multiple protection function was successfully constructed on the surface of Mg alloy substrate based on the three-level cooperative protection mechanism of “dynamic lubrication layer-static barrier layer-nano oil storage unit”. The combined action of PDMS and LDH could form a robust barrier to passively block corrosive media. The SO would form a dynamic lubrication layer at the surface to provide lubrication and dynamic barrier ability. The LDH could also act as the nano oil storage for SO to ensure the stability of lubrication layer. The final coating system showed excellent comprehensive properties such as long-term corrosion protection, anti-icing/deicing, hydrophobicity, self-cleaning and excellent mechanical stability. Due to the excellent barrier effect of the composite coating, it could still provide excellent corrosion protection after immersion in 3.5 wt% NaCl solution for 35 days. After 210 abrasion cycles and 320 tape-peeling cycles, respectively, the surface retained remarkably low ice adhesion strength (τ_ice < 20 kPa), demonstrating its exceptional mechanical durability. In addition, the LDH-PDMS/SO coating showed good anti-icing/deicing performance at −18 °C, outstanding adhesion (5B grade) and self-cleaning properties, and had great application potential in long-term anti-corrosion and anti-icing protection of Mg alloy.

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一种坚固的pdm多功能光滑涂层，具有长期耐腐蚀性，抗冰/除冰耐久性和自清洁性能

镁合金耐腐蚀性能差，低温下易结冰，严重限制了镁合金的应用。开发一种具有长期防腐和防冰/除冰性能的耐用涂层对镁合金的保护至关重要。本研究基于“动态润滑层-静态阻隔层-纳米储油单元”三级协同保护机制，在镁合金基体表面成功构建了具有多重保护功能的LDH（层状双氢氧化物）-PDMS（聚二甲基硅氧烷）/SO（二甲基硅油）光滑涂层。PDMS和LDH的共同作用可以形成一个强大的屏障，被动地阻挡腐蚀性介质。SO会在表面形成动态润滑层，提供润滑和动态屏障能力。LDH还可以作为SO的纳米储油器，保证润滑层的稳定性。最终涂层体系具有长效防腐、防冰/除冰、疏水性、自洁性和优异的机械稳定性等综合性能。由于复合涂层具有良好的阻隔作用，在3.5 wt% NaCl溶液中浸泡35天后仍能保持良好的防腐性能。经过210次磨损循环和320次胶带剥落循环后，表面仍保持了非常低的冰附着强度（τice < 20 kPa），表明其具有优异的机械耐久性。此外，LDH-PDMS/SO涂层在- 18℃下具有良好的抗冰/除冰性能，优异的附着力（5B级）和自清洁性能，在镁合金的长期防腐和防冰保护方面具有很大的应用潜力。

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来源期刊

Surface & Coatings Technology 工程技术-材料科学：膜

CiteScore

10.00

自引率

11.10%

发文量

921

审稿时长

19 days

期刊介绍： Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.