Outdoor atmospheric corrosion of carbon steel and weathering steel exposed to the tropical‐coastal climate of Thailand

• Published in: Materials and corrosion Vol. 71; no. 6; pp. 1019 - 1034
• Main Authors: Palsson, Namurata S., Wongpinkaew, Kosit, Khamsuk, Piya, Sorachot, Sikharin, Pongsaksawad, Wanida
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 01.06.2020
• Subjects: Alloying elements; Atmospheric corrosion; Carbon steel; Carbon steels; Chlorides; Corrosion products; Corrosion rate; Corrosion resistance; Corrosion resistant alloys; Corrosion resistant steels; Corrosion tests; Exposure; Meteorological parameters; Morphology; Nickel chromium steels; Pollutants; Rainfall; Reaction kinetics; Structural steels; thickness loss; weathering steel; Weathering steels; Thailand
• ISSN: 0947-5117; 1521-4176
• DOI: 10.1002/maco.201911340

This study focuses on atmospheric corrosion of carbon steel and weathering steel exposed at two different locations with dissimilar meteorological parameters and airborne pollutants in Thailand. The samples are subjected to an outdoor atmosphere for up to 36 months at Rayong, close to the Gulf of Thailand, and Phangnga, near the Andaman Sea. Thickness loss (µm), corrosion rate (µm/year) together with corrosion product morphology and composition are systematically analyzed using X‐ray diffraction and a scanning electron microscope. Corrosion resistance of the tested steels exposed at both locations is discussed based on the above‐mentioned parameters and calculated corrosion kinetics. The results indicate that the total time of wetness, amount of rainfall and chloride deposition rate play an important role in corrosion behavior of the tested steels. Alloying elements, copper, chromium and nickel, are shown to improve corrosion resistance of the samples when exposed at the location with a higher chloride concentration. This study focuses on atmospheric corrosion of carbon steel and weathering steel exposed at two different locations with dissimilar meteorological parameters and airborne pollutants in Thailand. The samples are subjected to an outdoor atmosphere for up to 36 months close to the Gulf of Thailand and near the Andaman Sea. Thickness loss and corrosion rate together with corrosion product morphology and composition are systematically analyzed.