CORROSION AND DAMAGE OF METALLIC MATERIALS IN TROPICAL ATMOSPHERE OF VIETNAM

Abstract

Corrosion and damage of metal materials in atmosphere are interested by scientists aiming to control and minimize economic losses and unexpected accidents as well as protect sustainable environment. It is necessary to understand naturally the atmospheric corrosion of metals and the relevant factors that affect corrosion process as well as to learn the knowledge in this field in order to control corrosion and prevent the failuresof components, devices and structures those are utilized in atmosphere.

The paper introduces briefly some fundaments of themetallic atmospheric corrosion and the corrosion effects of climatic and environmentalparameters as air temperature, air humidity, time of wetness and pollutants (air salinity - Cl^- content and SO²  deposition rate). The common types of failure in atmospheric environment are given, the concepts and methodology on classification of atmospheric corrosivity accordingto ISO standard are mentioned and applied to estimate the atmospheric corrosivity of some climatic regions in Vietnam. And finally, the paper summarizes the main results of atmospheric corrosion investigation and failure analysis those have been carried out at Institute of Materials Science