Evaluation of superficial chemical treatmentto improve the performance of thermal sprayed aluminium coatings
| Autor: | Nathalie Romero, Valentina Millano, Oladis de Rincón, Douglas Linares, Orlando Salas, Marianela Fernández, Everlyn Polo |
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| Jazyk: | English<br />Spanish; Castilian |
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Revista Técnica de la Facultad de Ingeniería, Vol 37, Iss 3 (2016) |
| Druh dokumentu: | article |
| ISSN: | 0254-0770 2477-9377 |
| Popis: | The objective of this research is to study the behaviour of thermal sprayed aluminium coatings after the application of superficial chemical treatments; for this purpose, 11 types of chemical solutions were applied on carbon steel probes (10 cm í— 15 cm í— 3 mm) which were previously thermal sprayed with aluminium coatings; and evaluated according to ISO 11474 in accelerated environment for 5 months. The test probes were evaluated monthly by visual inspection and photographic record, and withdrawn at 2, 4 and 5 months of exposure for their further analysis in laboratory. Corrosion rate and the behaviour of thermal sprayed coatings were evaluated using electrochemical techniques: Electrochemical Impedance Spectroscopy (EIS) and Anodic Potentiodynamic Polarization Curves (ASV). The treatments of sulphuric acid, oxalic and aloe vera increase the performance of thermal spayed aluminium coating; while commercial rust converter and tannin decrease its performance. |
| Databáze: | Directory of Open Access Journals |
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