Abstract:Electrochemical behavior of 5083-H116 Al alloy with flow velocity of seachest material for Al ship was evaluated. To examine the electrochemical characteristics of flow velocity and its effects on the performance of the alloy, experiments were conducted at four flow velocity variables using static state with an agitator. An ultrasonic vibration generator using piezoelectric effect was used in cavitation test according to the requirements of in ASTM-G32. The results show that the corrosion current density and damage were increased by applying the flow velocity compared to static state. Therefore, it is determined that the case of applying flow velocity is weaker to the corrosion.

Key words: aluminium ships; over-protection; marine growth prevention system; sea-chest; flow velocity