بررسي عوامل موثر بر روي مقاومت در برابر خوردگي لايه مركاپتوسيلان توسط روش EIS

An Investigation of Effective Parameters on Corrosion Resistance of Mercaptosilane using EIS method

Electrochemical Impedance Spectroscopy(EIS) has been conducted to investigate the corrosion resistance of the Mercapto si lane primer that has been coated on the mild steel. Characteristics of the silane layer depends on the condensation and hydrolysis reactions rate including pH, temperature, reaction time, reagent concentration, nature and aging of solution , molar ratio, and drying. To study the effect of these factors, the design of experiment by means of mix Taguchi method was performed. Results revealed that surface treatment method, pH and drying of the silane layer are the most effective factors on the corrosion resistance of the silane layer. The resistane of the coating was improved as pH increased. Annealing of the silane layer also shown results in better corrosion resistance.