The Effect of Concentration And Temperature on The Activities of Polar and Semi Polar Mango Peel Extract as Iron Corrosion Inhibitors In Solution of NaCl 1% Tety Sudiarti 1 , Asep Supriadin 2 , Desanti Sarifufah 3 , Citra Fitriani Kusman 4 {tety.sudiarti@uinsgd.ac.id 1 , asupriadin@uinsgd.ac.id 2 ,sarifufahdesanti@gmail.com 3 , citrafitriani@uinsgd.ac.id 4 } Chemistry Department, Universitas Islam Negeri Sunan Gunung Djati Bandung, Bandung, Indonesia 1,2,3,4 Abstract. In the mining industry (petroleum) organic acids that have low molecular weight such as formic acid and acetic acid when mixed with water will become a corrosive medium on the inside of the iron used in production. The use of inhibitors is the cheapest, easiest, most effective, and environmentally friendly corrosion control technique so that it is widely applied in various industrial fields, such as the petroleum mining industry. The purpose of this study was to determine the corrosion inhibition efficiency and activation parameters of the polar and semi-polar mango peel extract compound as an iron corrosion inhibitor in electrolyte solutions. Mango peel extract was obtained through the extraction process using maceration methods identified by the phytochemical test and FTIR on extracts obtained. Mango peel extract contains flavonoids, alkaloids, and tannins. This compound has the opportunity to be used as a corrosion inhibitor because it has high electron density and contains nitrogen atoms with free electron pairs so that it allows strong adsorption on metal surfaces and increases corrosion inhibition activity. The inhibition activity was analyzed by the wheel test method or measurement of weight loss with variations in concentration and temperature. The media used in NaCl 1% electrolyte solution. The inhibition activity of mango peel extract increased with increasing inhibition concentration. In the compound of polar mango peel extract obtained optimum inhibition efficiency at a concentration of 48 ppm was 62.7572%. Whereas in the semi polar mango peel extract compound the optimum inhibition efficiency was obtained at a concentration of 40 ppm with inhibition efficiency of 90.0807%. Based on the results of SEM, Iron without inhibitors and not by immersion in an electrolyte solution such as slabs, iron with immersion in an electrolyte solutions only such as corroded and iron with the addition of inhibitors and immersion in an electrolyte solutions seen to protect the iron from corrosive. Keywords: Corrosion Inhibitor, Mango Peel Extract, Wheel Test Method, SEM. 1 Introduction Since 2000, the world has opposed the shortage of iron ore and steel raw materials in the international market due to the increasing demand for steel in developed or developing countries. Iron ore is used for steel industry purposes. Together with coal, iron is the main mineral needed by humanity to maintain civilization. Both of these mining materials are very widely used, in addition to petroleum, and building materials for physical development purposes. Based on the results of an inventory by the Ministry of Economy of West Germany (1980), iron is the fifth most used mineral by humans, reaching 888 million tons[1]. More ICONISTECH 2019, July 11-12, Bandung, Indonesia Copyright © 2021 EAI DOI 10.4108/eai.11-7-2019.2298046