Corrosion monitoring using acoustic emission and potentiodynamic method

This paper describes an investigation of measurement of corrosion by potentiodynamic method and acoustic emission (AE) technique which were carried out simultaneously. The experiments were performed on carbon steel material which is normally manufactured for storage tank floor. Tests were conducted at room temperature in 5% H₂SO₄ solution acidified to pH 2. The acoustic emission signals generated from electrochemical process are captured from piezoelectric transducer. Determination of corrosion rate was calculated using the tafel plot. The experimental results are very promising that AE signals can be detected during the presence of corrosion in the material with the corrosion rate of 0.813 millimeter per year.