CORROSION AND MARINE MACROFOULING OF FIVE ENGINEERING ALLOYS IN ARABIAN GULF SEAWATER

摘要

Marine macrofouling of the surfaces of UNS S31600, UNS N08028, UNS N-8825, UNS N06030 and UNS C71500, have been identified along the shores of the Arabian Gulf in Kuwait. The corrosion rate of the alloys was also determined as a function of immersion time by the weight loss method. The exposure period covered both the summer and winter seasons at which the average seawater temperature was 35°C and 22°C respectively. With the exception of the UNS C71500, all the other alloys were heavily fouled with greenish, brownish, and reddish type of algae and different sizes of barnacles. The limiting factor for performance in seawater has been shown to be crevice corrosion, but UNS N08028, UNS N08825 and UNS N06030 were unaffected by localized corrosion for a period of 24 months.