Construção do protótipo de câmara de névoa: uma avaliação das interações entre condições microclimáticas e a degradação de materiais

Abstract

This paper presents the design, construction and assembly of a prototype fog chamber for accelerated corrosion testing. Corrosion is a phenomenon that compromises the durability and integrity of metallic materials, and the development of methods for its evaluation is essential. This study aims to explore how the microclimate within cracks affects corrosion and weight loss of metallic materials, providing support for the creation of more effective protection strategies. The choice of the problem in question is related to its persistent presence at the Instituto Federal da Bahia (IFBA), an institution dedicated to teaching and learning, where students and professors interact to acquire knowledge and skills, offering imminent risks to its students and employees with the possibility of structural failures and environmental impacts. Fog chambers are widely used to simulate aggressive conditions in controlled environments, following standards such as ASTM B117 and ISO 9227, and they are designed to accelerate corrosion processes, allowing the evaluation of the durability and resistance of materials in a short period of time. It is widely used in industries such as the automotive, aerospace and naval industries, ensuring that materials and structures do not fail prematurely due to corrosion. The development of the prototype involved the selection of materials to resist corrosion, an efficient nebulization system and precise temperature and humidity control. The results obtained demonstrate the viability of the equipment for carrying out standardized tests, contributing to studies on the durability of coatings and metal alloys. With this, we obtained as main results a prototype capable of meeting the needs of the institute's materials and a teaching material mainly for the industrial mechanics course, which can be used as a stage for metallographic tests and tests in corrosive environments.