PERBANDINGAN PENGGUNAAN INHIBITOR ORGANIK DAN ANORGANIK TERHADAP LAJU KOROSI PADA PIPA ASTM A53 GRADE B

Abstract - In the field of industrial materials, corrosion is a very common problem. Losses caused by corrosion such as reduced strength of the pipe material, so maintenance costs are required which are quite expensive. In the application of ballast system pipes at Dock A of Company X using ASTM A53 Grade B pipe material, internal corrosion occurs due to the flow of seawater and the humid underground environment. Testing was conducted using the immersion test method for a duration of 14 days or 336 hours, along with weight loss calculations to determine the corrosion rate and lifespan of the pipes. The test results show that specimens with anorganic inhibitor (Na2CrO4) have a corrosion rate of 0.235410588 mm/year, while specimens with organic inhibitor (papaya sap) have a corrosion rate of 0.450920879 mm/year. The use of anorganic inhibitor (Na2CrO4) is the most technically efficient choice for ASTM A53 Grade B materials, with a corrosion rate of 0.235410588 mm/year. This indicates that the use of anorganic inhibitor (Na2CrO4) is more efficient in protecting ASTM A53 Grade B pipes from corrosion