Pemanfaatan Lignin Dari Lindi Hitam (Black Liquor) Sebagai Inhibitor Korosi Besi

Corrosion is one of the important problems faced by advanced industry groups. The corrosion process occurs naturally and can not be prevented entirely, and often unexpectedly taking place beyond the planned prediction. Various processes can be done to prevent corrosion, one of them by using corrosion inhibitor process. A corrosion inhibitor is the process by which a substance is added to the environment so as to reduce the risk of corrosion to the metal. The inhibitor used is derived from lignin obtained from waste from the pulp and paper industry named black liquor. In this study used lignin variation with percent weight (0, 3, 5, 8 gram) and time variation with time spent (2, 4, 6 hours). The most optimal inhibition efficiency occurs in iron which is soaked with time 4 hours and with lignin concentration 8 g / L that is equal to 73,6842105