Pengendalian Laju Korosi Baja St-37 Dalam Medium Asam Klorida dan Natrium Klorida Menggunakan Inhibitor Ekstrak Daun Teh (Camelia Sinensis). (Control of ST-37 Steel Corrosion Rate in Hydrocloride Acid And Natrium Cloride Media By Using Camelia Sinensis Leaves Inhibitor Extract)

Sari, Desi Mitra and Handani, Sri and Yetri, Yuli (2013) Pengendalian Laju Korosi Baja St-37 Dalam Medium Asam Klorida dan Natrium Klorida Menggunakan Inhibitor Ekstrak Daun Teh (Camelia Sinensis). (Control of ST-37 Steel Corrosion Rate in Hydrocloride Acid And Natrium Cloride Media By Using Camelia Sinensis Leaves Inhibitor Extract). POLI REKAYASA, 8 (2). 76-85. ISSN 1858-3709

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Abstract

A research to control corrosion rate of St-37 steel in acid chloride and sodium chloride medium using tea leaf (Camellia sinensis) extract inhibitor has been done. The method used is potentiodynamic to see the value of the corrosion current and weight loss method for corrosion rate.. Corrosive medium used were HCl 3% and NaCl 3%. The concentration of the extract used range from 1%-10% and the immersion time is four days. The results showed that the corrosion rate was greatest in the corrosive medium without addition of inhibitors, whereas the corrosion rate decreases with the addition of inhibitors, it is also evident from the results of the Tafel plot shows Icor impairment. The greater the concentration of inhibitor that is used the lower the corrosion rate. Greatest efficiency values both for medium corrosive ​​obtained at inhibitor concentrations of 10%, 86,3% in HCl and 92% in NaCl. This shows that tea leaves extract inhibitor is very efficient in controlling the rate of corrosion in HCl and NaCl medium. From the optical photograph analysed on the surface morphology of St-37 steel showed that the addition of tea leaf extract suffered less corrosion.

Item Type:Article
Subjects:F Science > F Science (General)
Divisions:Jurusan Teknik Mesin > Prog.Studi Teknik Mesin-D3 > Jurnal/Karya Ilmiah
ID Code:269
Deposited By:Mr. OP Repo-1 Puskom
Deposited On:19 Oct 2016 08:13
Last Modified:09 Nov 2016 14:37

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