Pengaruh Variasi Konsentrasi Inhibitor Ekstrak Daun Kelor dan Temperatur Larutan Karbon Dioksida Terhadap Korosivitas Baja ASTM A106 Grade B

Saraswati, Betari (2021) Pengaruh Variasi Konsentrasi Inhibitor Ekstrak Daun Kelor dan Temperatur Larutan Karbon Dioksida Terhadap Korosivitas Baja ASTM A106 Grade B. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Baja ASTM A106 Grade B merupakan material yang banyak digunakan dalam perpipaan di Industri minyak dan gas. ASTM A106 juga dikenal sebagai pipa ASME SA106, baja ini biasanya digunakan dalam bidang perpipaan untuk mengangkut cairan dan gas yang menunjukkan suhu dan tingkat tekanan yang lebih tinggi. Hal tersebut karena baja ASTM A106 Grade B memiliki properties yang sesuai dengan kebutuhan Industri penambangan minyak. Namun, jika dibandingkan dengan baja yang lain seperti High Alloy Steel, Stainless Steel, dsb. Baja ASTM A106 Grade B memiliki ketahanan korosi yang cukup rendah. Salah satu cara pengendalian korosi yang dapat dilakukan adalah dengan penambahan inhibitor. Pada penelitian ini, inhibitor yang digunakan adalah inhibitor organik yakni inhibitor ekstrak daun kelor (moringa oleifera L.) yang diaplikasikan pada lingkungan elektrolit karbon dioksida dengan variabel yang meliputi temperatur dan penambahan konsentrasi. Adapun variasi temperatur uji yang digunakan adalah 60oC, 65oC, 70oC, dan 75oC. Sedangkan untuk variasi konsentrasi yang digunakan adalah 0 ppm, 400 ppm, 800 ppm, dan 1200 ppm. Pengujian yang dilakukan pada penelitian ini adalah Uji GC-MS, Uji FTIR, UjiPolarisasi, Uji EIS, dan Uji AAS. Hasil Uji GC-MS menujukkan adanya senyawa 3,5,7-Trihydroxy-2-(4-hydroxypHenyl)-4H-chromen4-one yang termasuk senyawa golongan flavonoid sehingga mengidentifikasikan adanya flavonoid dalam inhibitor ekstrak daun kelor. Hasil pengujian FTIR menunjukkan gugus fungsi seperti O-H; C≡N, NH3+ dan NO2 yang teradsorpsi pada permukaan baja. Hasil polarisasi menunjukkan bahwa penambahan konsentrasi optimal terjadi pada konsentrasi 800 ppm dengan efisiensi sebesar 90,69% dan temperatur dari larutan karbon dioksida yang optimal digunakan untuk menurunkan laju korosi adalah ketika temperature 60oC. Hasil pengujian ini juga menunjukkan bahwa inhibitor ekstrak daun kelor bertipe mixing inhibitor. Dan terakhir pengujian EIS menunjukkan kenaikan Rp saat penambahan konsentrasi inhibitor ekstrak daun kelor.
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ASTM A106 Grade B steel is a material widely used in piping in the oil and gas industry. ASTM A106 is also known as ASME SA106 pipe, this steel is commonly used in piping fields to transport liquids and gases indicating higher temperatures and pressure levels. This is because ASTM A106 Grade B steel has properties that suit the needs of the oil mining industry. However, when compared to other steels such as High Alloy Steel, Stainless Steel, etc. ASTM A106 Grade B steel has fairly low corrosion resistance. One way corrosion control can be done is with the addition of inhibitors. In this study, the inhibitors used were organic inhibitors of moringa leaf extract (moringa oleifera L.) that were applied to the electrolyte environment of carbon dioxide with variables that include temperature and increased concentration. The test temperature variations used are 60oC, 65oC, 70oC, and 75oC. As for the variation in concentrations used are 0 ppm, 400 ppm, 800 ppm, and 1200 ppm. Tests conducted in this study were GC-MS Test, FTIR Test, Polarization Test, EIS Test, and AAS Test. Gc-MS Test results show the presence of compounds 3,5,7-Trihydroxy-2-(4-hydroxypHenyl)-4H-chromen4-one which belongs to flavonoid group compounds so as to identify the presence of flavonoids in moringa leaf extract inhibitors. FTIR test results show cluster functions such as O-H; C≡N, NH3+ and NO2 are intercepted on steel surfaces. Polarizing results showed that the addition of optimal concentration occurred at a concentration of 800 ppm with an efficiency of 90,69% and the temperature of the optimal carbon dioxide solution used to lower the corrosion rate was when the temperature was 60oC. The results of this test also showed that moringa leaf extract inhibitors are mixing inhibitors. And lastly EIS testing showed an increase in Rp when the concentration of moringa leaf extract inhibitors was added.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Inhibitor; Moringa Oleifera; Polarisasi, Korosi, FTIR, EIS, Polarization, Corrosion, FTIR, EIS.
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA462 Metal Corrosion and protection against corrosion T Technology > TA Engineering (General). Civil engineering (General) > TA467 Iron and Steel Corrosion and protection against corrosion
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Betari Saraswati
Date Deposited:	14 Aug 2021 19:02
Last Modified:	14 Aug 2021 19:02
URI:	http://repository.its.ac.id/id/eprint/86660

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