| Autor: |
Savignac P; VM Building Solutions, Les Mercuriales, Tour du Ponant, 40 rue Jean Jaurès, 93170 Bagnolet, France. pauline.savignac@vmzinc.com., Menu MJ; CIRIMAT, Université de Toulouse, CNRS INPT UPS, UMR 5085, 118 Route de Narbonne, 31062 Toulouse CEDEX 09, France. menu@chimie.ups-tlse.fr., Gressier M; CIRIMAT, Université de Toulouse, CNRS INPT UPS, UMR 5085, 118 Route de Narbonne, 31062 Toulouse CEDEX 09, France. gressier@chimie.ups-tlse.fr., Denat B; VM Building Solutions, Les Mercuriales, Tour du Ponant, 40 rue Jean Jaurès, 93170 Bagnolet, France. bastien.denat@gmail.com., Khadir YE; VM Building Solutions, Les Mercuriales, Tour du Ponant, 40 rue Jean Jaurès, 93170 Bagnolet, France. elkhadir.yacine@gmx.fr., Manov S; VM Building Solutions, Les Mercuriales, Tour du Ponant, 40 rue Jean Jaurès, 93170 Bagnolet, France. stephan.manov@vmzinc.com., Ansart F; CIRIMAT, Université de Toulouse, CNRS INPT UPS, UMR 5085, 118 Route de Narbonne, 31062 Toulouse CEDEX 09, France. ansart@chimie.ups-tlse.fr. |
| Abstrakt: |
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. |
