Bibliographic citations
Rojas, L., (2024). Evaluación de la performance del recubrimiento de zinc en atmósfera marina en dependencia del espesor y tiempo de exposición [Universidad Nacional de Trujillo]. https://hdl.handle.net/20.500.14414/21254
Rojas, L., Evaluación de la performance del recubrimiento de zinc en atmósfera marina en dependencia del espesor y tiempo de exposición []. PE: Universidad Nacional de Trujillo; 2024. https://hdl.handle.net/20.500.14414/21254
@mastersthesis{renati/1045594,
title = "Evaluación de la performance del recubrimiento de zinc en atmósfera marina en dependencia del espesor y tiempo de exposición",
author = "Rojas Barreto, Lisnaida del Rosario",
publisher = "Universidad Nacional de Trujillo",
year = "2024"
}
In this work, the performance of the zinc coating in the marine atmosphere of Buenos Aires, Trujillo-Perú, was evaluated, depending on its thickness and exposure time. During a period of three, six, nine and twelve months, SAE 1020 steel samples of dimensions 150x100x1.3mm with zinc coatings between 8-400 μm were exposed. Base don the ASTMB-119 standard, a group of these underwent two insitions per sample on the 60mm long coating, varying their width betwee 1 and 5 mm parallel to the edges. The corrosive process of the plates was evaluated by visual observation according to ASTM D-610 standard, also with scanning electron microscopy (SEM) and Energy Dispersion X-Ray Spectroscopy (EDS) regarding the distribution of corrosion products and content of chemical elements both on the surface of the coating as over the incisions. The los of thickness was estimated as a function of time, previously eliminating the corrosion products formed according to the ASTM G1 standard. The minimum thickness of anticorrosive protection of the steel samples for one year of exposure was of the order of 20 μm. From zero to six months of exposure the loss of thickness of the zinc electrolytic coating is approximately constant. From six to twelve months of exposure, the loss of thickness of the electrolytic coating increased depending on the initial thickness of the coating. The elements of the corrosion products were identified after two months of exposure, finding Zn, O, Na, C, Cl on the coating, and lower percentages of S, Si and Al; over incisions, in dark zone: Fe, O, C, Na and in a lesser proportion Cl, and in the white zone: Zn, O, C, Ca, Na, Mg, Fe with lower percentages of K, Al, Si, S and Cl. Inside of the incisions, the corrosion products composed of zinc and other elements present in the médium are filled, until it is covered according to its thickness.
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