Simulative and accelerative experimentation of carbon steel corrosion in soil

Three soil corrosion simulative and accelerative experiments such as constant temperature and water content, alternative temperatures and alternative water contents of the Q235 carbon steel were conducted in sea-shore salt soil. The results indicate that the corrosion morphology of the carbon steel in soil with 10% (mass fraction) water content shows localized corrosion at the beginning, and turns to uneven general corrosion with time. For other experimental conditions, its morphologies are mainly uniform corrosion. The corrosion rate at 70°C is higher than that at 50°C, and reaches to maximum at the same temperature when the water content is 10%. For constant temperature and water content experiment, its corrosion potential increases with time. Its corrosion potential and redox potential increase with water content and temperature decreasing in the alternative temperatures and alternative water contents experiments.