Study on the Evaluation Method of Seawater Corrosivity by Environmental Factors

摘要

The main factors influencing localized corrosion depth of carbon steel in sea water has been found in accordance with grey relational grade. Three most important environmental factors for seawater corrosion of carbon steel included seawater temperature, adhesion area of marine animals and plants and pH. Meanwhile the evaluation factor of seawater corrosivity: Q=Σ from i=1to 3 of (Yi x fi) is proposed. Here Yi refers to the above-mentioned 3 environmental factors, and fi is the grey relational garde of there factors to localized corrosion depth. High or low of corrosivity in sea areas can be compared.