Pengaruh Konsentrasi Ekstrak Kulit Buah Maja (Aegle Marmelos (l.) Corea) terhadap Laju Korosi Baja Karbon API 5L pada Medium NaCl 3% dan H2SO4 3%

Abstrak

A study has been conducted on the extract concentration effect of Maja Peel as an inhibitor of low carbon API 5L in corrosive medium of NaCl 3% and H₂SO₄ 3%. The soaking process of low carbon API 5L was done for 35 days with variation of addition inhibitor concentrations at 0%, 0,4%, 0,5%, 0,6%, 0,7%, and 0,8%. The testing of Corrosion rate is done by weight loss method. The results showed that the highest corrosive rate in corrosive medium of NaCl 3% and H₂SO₄ 3% was at 0% which is inhibitor concentration, 0,06 x 10⁴ mm/y and 16,55 x 10⁴ mm/yconcentration. Meanwhile, the lowest corrosion rate at 0.8% inhibitor concentration for corrosive medium ofNaCl 3% and 0.5%for H₂SO₄3% corrosive medium. Hence, the greatest effectiveness of corrosion occurs at the concentration of 0.8% in a corrosive medium of NaCl 3% with effectiveness of 85,71% and 0.5% in corrosive medium of H₂SO₄ 3% with the effectiveness of 79.35%. The characterization result of X-Ray Diffraction (XRD) shows that the phase formed is pure Fe. Characterization of Scanning Electron Microscopy (SEM) showed uneven clusters and smaller sizes, holes and cracks also with less than 0.8% inhibitors for corrosive medium of NaCl 3% and 0.5% for corrosive medium of H₂SO₄3% compared with 0% inhibitor of maja peel extract on corrosive medium ofNaCl 3% and H₂SO₄ 3%. Characterization of Energy Dispersive Spectroscopy (EDS) in samples with corrosive medium of H₂SO₄3% obtained the element S (Sulfate)