Accelerated corrosion test based on ISO 16539 for life prediction of carbon steel in tropical coastal areas

The development of accelerated corrosion test has been focused on cyclic corrosion test due to improved correlation with the field corrosion behavior. This study applied ISO 16539 to simulate the tropical coastal environment in Thailand. ISO 16539 method B with 0.1 g-salt/m² correlated well with Rayong (C2) data. A method for calculating salt deposition and testing period was derived by interpolation and extrapolation of the simulated test results that were calibrated with the field-test database for Rayong (C2) and Phangnga (C4). This work enables the application of ISO 16539 in life prediction for carbon steel exposed under tropical coastal climate with sulfur dioxide deposition rate less than 13 [mg/m²/day: mmd] and chloride ion deposition rates more than 10 mmd.