Windi Zamrudy, Heny Dewajani, Anang Takwanto, Erwan Yulianto
The electric steam power plant uses water (service water) which comes from the seawater desalination process with reverse osmosis membrane technology. Because it comes from seawater, this service water has relatively high corrosive properties, so it is necessary to condition using corrosion inhibitors to keep the corrosion rate from exceeding the expected value limits. The purpose of this research was to determine the effectiveness of the use of sodium silicate in inhibiting the corrosion rate of mild steel and copper The types of specimens used for the corrosion test were copper and mildsteel with varying concentrations of sodium silicate inhibitor. Determination of the rate of corrosion using the weight loss coupon method and the simulation was carried out at the corrosion rack. From the results can be concluded that sodium silicate inhibitor works very effectively when applied to service water systems with a concentration of 20 to 30 ppm. This concentration was also effective in reducing the corrosion rate of mild steel and copper metals. Sodium silicate inhibitor can reduce the corrosion rate of mild steel and copper metals, namely: 0.00531 to 0.00073 & 0.00074 to 0.00004 mpy, respectively. So, the implication of this research with the concentration of 20 to 30 ppm sodium silicate can make the service life of service water piping much longer. © 2023 American Institute of Physics Inc.. All rights reserved.
Department of Chemical Engineering, State Polytechnic of Malang, Malang, Indonesia; Paiton Operation & Maintenance Indonesia, Probolinggo, Indonesia