ANALISA PENGARUH PENAMBAHAN INHIBITOR KALSIUM KARBONAT DAN EKSTRAK DAUH TEH (CAMELLIA SINENSIS) PADA FLUIDA TRYETHYLENE GLYCOL TERHADAP LAJU KOROSI MATERIAL NOZZLE A 106 GRADE B
Abstract - A company engaged in the oil and gas industry. This company is from a branch of an international company from Australia, this company meets domestic gas needs. The network system in this company is designed safely. But there are a few problems that occur on one vessel that is on the Onshore Processing Facility. The vessel experienced thickness thinning in various places after being inspected and also found leaking on one of the nozzles that were on the vessel. Vessels that are at the plant do not have deep corrosion protection, this is very possible for a rapid corrosion rate. And also added to the operating time which has reached 9 years. From the description above, this final project will conduct a research on corrosion control with the addition of inhibitors with the test material according to the existing nozzle on the vessel, namely A 106 Gr B. The inhibitors used are calcium carbonate and Extraction of Tea Leaves (Camellia Sinensis) with variations in doses of 0 ppm, 100 ppm, 200 ppm and 300 ppm. The test was carried out by POTENSIOSTAT method with different temperatures, namely 30 oC, 35 oC, 40 oC, 45 oC and 50 oC. After testing, data will be obtained to find the value of the corrosion rate. Then a comparison of the two inhibitors is made which is more effective in controlling the corrosion rate. The results of the tests that have been done show that the value of the corrosion rate at a temperature of 50 oC and a concentration of 300 ppm inhibitors of calcium carbonate 0.0296 mm / y with efficiency of 0.21% while the Extraction of Tea Leaves inhibitors (Camellia Sinensis) is 0.0212 with inhibitor efficiency of 0.43%. From these results it can be concluded that the addition of the Tea Leaf Extract Extract (Camellia Sinensis) more effective inhibitor from calcium carbonate inhibitors.