Improvement of Adhesion Properties and Corrosion Resistance of Sol-Gel Coating on Zinc

被引:12
作者
Savignac, Pauline [1 ]
Menu, Marie-Joelle [2 ]
Gressier, Marie [2 ]
Denat, Bastien [1 ]
El Khadir, Yacine [1 ]
Manov, Stephan [1 ]
Ansart, Florence [2 ]
机构
[1] VM Bldg Solut, Les Mercuriales, Tour Ponant, 40 Rue Jean Jaures, F-93170 Bagnolet, France
[2] Univ Toulouse, CNRS INPT UPS, CIRIMAT, UMR 5085, 118 Route Narbonne, F-31062 Toulouse 09, France
来源
MOLECULES | 2018年 / 23卷 / 05期
关键词
sol-gel; hybrid materials; corrosion; adhesion; coating; zinc; SILICA SOL; CERIUM; PROTECTION; METALS;
D O I
10.3390/molecules23051079
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Corrosion is a major problem for durability of many metals and alloys. Among the efficient classical surface treatments, chromate-based treatments must be banished from industrial use due to their toxicity. At the same time, sol-gel routes have demonstrated high potential to develop an efficient barrier effect against aggressive environments. By this process, the anti-corrosion property can be also associated to others in the case of the development of multi-functional hybrid coatings. In this paper, the main goal is precisely to improve both the corrosion resistance and the adhesion properties of phosphated zinc substrates by the deposition of a hybrid (organic-inorganic) sol-gel layer. To reach this double objective, a choice between two formulations 3-glycidoxypropyltrimethoxysilane (GPTMS)/aluminum-tri-sec-butoxide (ASB) and 3-(trimethoxysilyl)propylmethacrylate (MAP)/tetraethylorthosilicate (TEOS) was firstly made based on the results obtained by microstructural characterizations using SEM, optical analysis, and mechanical characterization such as shock and/or scratch tests (coupled to climatic chamber and salt spray exposure). Several investigations were performed in this study, and the best formulation and performances of the system were obtained by adding a new precursor (1-[3-(trimethoxysilyl)propyl]ureido-UPS) under controlled conditions, as detailed in this paper.
引用
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页数:13
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