OPTIMALISASI PENGGUNAAN INHIBITOR ORGANIK LARUTAN DAUN JAMBU BIJI (PSIDIUM GUAJAVA L) TERHADAP LAJU KOROSI BAJA ST 37 PADA LARUTAN NaCl 5%

MULYANA, DIAN (2023) OPTIMALISASI PENGGUNAAN INHIBITOR ORGANIK LARUTAN DAUN JAMBU BIJI (PSIDIUM GUAJAVA L) TERHADAP LAJU KOROSI BAJA ST 37 PADA LARUTAN NaCl 5%. Sarjana (S1) thesis, UNIVERSITAS ISLAM "45" BEKASI.

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Abstract

Steel ST 37 is a standard naming DIN 17-100 governing the type of carbon steel for the purposes of making machine components standardized according to tensile strength. ST 37 steel has a tensile strength of 37 〖kg/mm〗^2. ST 37 steel belongs to the low carbon steel group. Optimization of the use of organic inhibitors of guava leaf solution (psidium guajava l) on the corrosion rate of steel st 37 in 5% Nacl solution has been studied in organic inhibitors of guava leaf solution used as coatings with soaking times of 7 days, 14 days and 21 days. The corrosion rate test was carried out using the weight loss method. The results of the research at each immersion time showed that the inhibitor layer 1 of the guava leaf solution to inhibit corrosion was 7.149 and the longer the immersion time resulted in a decrease in the corrosion rate of St 37 carbon steel. The results of ST 37 steel without inhibitors were 12,937 mpy , the value of layer 1 inhibitors was 9,905 mpy, layer 2 inhibitors were 7,149 mpy, and layer 3 inhibitors were 8,341 mpy. Keywords: Corrosion inhibitor, St37, 5% NaCl, guava leaf solution.

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