PENGENDALIAN KOROSI PADA BAJA ST 42 MENGGUNAKAN INHIBITOR EKSTRAK DAUN SIDAGURI PADA MEDIA H2SO4

Abstract

Corrosion Control on ST 42 Steel Using Sidaguri Leaf Extract Inhibitor on H₂SO₄ Media. This study aims to determine the effect of Sidaguri leaf extract as an inhibitor on the corrosion rate immersed in H₂SO with inhibitor variations 0%, 0.1%, 1%, and 10%. The immersion time was 168 hours, 336 hours, and 504 hours. The method used to measure the corrosion rate is weight loss. This research was conducted in the Mechanical Engineering Laboratory of the Faculty of Engineering and the Pharmacy Laboratory of Tadulako University. The results of the corrosion rate test on ST 42 steel soaked in H₂SO₄ and given inhibitor of Sidaguri leaf extract increased the corrosion rate with increasing immersion time so that the percentage of corrosion rate and weight loss increased, the effect of Sidaguri leaf extract
with inhibitor concentration 0.1%,1%, and 10% indicates the greater the concentration, the slower the corrosion. because of the tannin content in Sidaguri leaf extract which can inhibit the corrosion rate.

Keywords: Weight loss, Corrosion Rate, Sidaguri Leaf Extract, Steel ST 42, H₂SO₄.