Pré-Tratamento à Base de Silanos para Substratos em A？o Inoxidável a Utilizar na Indústria Automóvel

automotive industry is nowadays more and more demanding, basically involving the deepening and technological of its painting processes. so that, to a better performance in the anticorrosive protection is achieved, in this work are considered alternatives to the substrates commonly used in the powder painting (steel, aluminium and galvanized steel), such as the case of stainless steel. as common fosfatation process used in the chemical pre-treatment of iron substrates, is well known to be unsuitable for stainless steel because it does not lead to a coating with good adhesion and good anticorrosive protection properties, a recent chemical pre-treatment silane based, used in automotive painting, was applied. getting a good coating of stainless steel parts, is the aim of this work, ensuring a good adhesion a anticorrosive protection of the coating to the substrate. accelerated weathering, like salt spray and high humidity tests, were used to evaluate the anticorrosive behaviour. physical characterization of the coating was performed through the evaluation of both, its adhesion to the substrate by cross cut test method and its hardness by scratch resistance test. other complementary tests were also used, such as the resistance to boiling water, together with visual and microscopic inspections.