Diseño y construcción de una cámara de envejecimiento acelerado para ensayos de corrosión en pinturas, recubrimientos y otros materiales.

Abstract

The objective was the design and manufacture of an accelerated aging wall cavity for corrosion tests in paints, coatings and other materials. Due to the lack of a team in the Corrosion laboratory of the career Ingeniería Química of ESPOCH, in which practices are carried out to increase the knowledge acquired in class and achieving a better performance, this equipment being a didactic and functional tool for learning process. The NTE INEN 1032-84, ASTM G154 - 06 and G 151-00 standards were used as a basis to develop the project and accomplish the objectives, combining several criteria of each regulation. The prototype is manufactured of AISI 304 with stainless steel and different accessories such as: UV lamps, among others. Inside it consists of two stainless steel grills in order to the change can occurs homogeneously in the samples; due to engineering calculations were applied. Finally it was concluded with the validation of the equipment through a laboratory practice, where the prototype remained stable during the process, this was done in collaboration with career of Ingeniería Química, corrosion subject, where the specimens stayed exposed inside the wall cavity during 200 hours by specifications of the standards mentioned before, worked with alternating cycles of light and darkness, including both day and night, achieving visible results such as weight loss of all exposed plates, discoloration, and rust up to 33% of the non-corrosive paint, which is an indication that corrosion occurred, in addition to the presence of rust and the formation of blisters on the surface of the specimens, a minimum exposure time is recommended of 200 hours.