Pengaruh kecepatan aliran dan konsentrasi inhibitor obat parasetamol terhadap proteksi korosi baja karbon API 5L grade B pada lingkungan asam pH 5

Anastacia, Reigina Zhazha (2015) Pengaruh kecepatan aliran dan konsentrasi inhibitor obat parasetamol terhadap proteksi korosi baja karbon API 5L grade B pada lingkungan asam pH 5. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Korosi merupakan salah satu masalah utama penyebab terjadinya kerusakan pada peralatan industri. Beberapa faktor dapat menjadi penyebab korosi, yaitu adanya aliran. Salah satu cara untuk mengendalikan korosi adalah dengan menambahkan suatu zat kimia dalam jumlah sedikit ke dalam suatu lingkungan atau biasa disebut inhibitor. Pada penelitian ini digunakan obat parasetamol (N-acetyl-4-aminophenol) yang mengandung senyawa phenol sebagai inhibitor terhadap proteksi korosi baja API 5L grade B di media lingkungan asam pH 5 dengan adanya pengaruh aliran dan konsentrasi inhibitor. Digunakan kecepatan aliran 0 rpm, 200 rpm, dan 400 rpm serta konsentrasi inhibitor 0 ppm, 100 ppm, 150 ppm, 200 ppm, dan 250 ppm. Untuk mengetahui pengaruh dan mekanisme inhibitor obat parasetamol dilakukan melalui pengujian weight loss, polarisasi tafel, pengujian elektrokimia impedansi dan perhitungan adsorpsi isothermal Langmuir. Hasil yang didapatkan inhibitor obat parasetamol mampu bekerja pada kecepatan aliran sampai dengan 400 rpm dibuktikan dengan efisiensi inhibitor yang diperoleh sebesar 91.9 % pada kondisi kecepatan aliran 400 rpm dan konsentrasi inhibitor 250 ppm. Mekanisme inhibisi obat parasetamol cenderung bersifat fisisorpsi berdasarkan hasil perhitungan adsorpsi isotherm Langmuir sebesar -7.7 kJ/mol. ============================================================================================ Corrosion is one of the main problems which causes defect in industrial equipment. A few factors could initiate the occurrence of corrosion, some of them are the presence of flow. One methods to control corrosion is to add some chemical substances into the environment, commonly known as inhibitor. In this study, paracetamol (N-acetyl-4aminophenol) which contains phenol compound was used as an inhibitor for corrosion protection of API 5L grade B steel with various flow conditions and inhibitor concentrations in acidic environment of pH 5. A flow rate of 0 rpm, 200 rpm, and 400 rpm and various inhibitor concentration of 0 ppm, 100 ppm, 150 ppm, 200 ppm, and 250 ppm were used in this research. To determine the effect and mechanism of paracetamol inhibition, weight loss test, tafel test, polarization test and Langmuir isotherm adsorption calculation were conducted. The result obtained was that the paracetamol inhibitor could work in a flow proven by the efficiency of the inhibitor obtained at 91.96% in 400 rpm flow rate condition and 250 ppm inhibitor concentration. Inhibition mechanism of the paracetamol tended to be physisorption in accordance to Langmuir adsorption isotherm calculation at -7.7 kJ/mol.

Item Type: Thesis (Undergraduate)
Additional Information: RSMt 620.112 23 Ana p
Uncontrolled Keywords: Parasetamol; Aliran; API 5L grade B; Adsorpsi Isotherm
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA418.74 Corrosion and anti-corrosives
Divisions: Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User: - Taufiq Rahmanu
Date Deposited: 13 Nov 2019 02:56
Last Modified: 13 Nov 2019 02:56
URI: http://repository.its.ac.id/id/eprint/71737

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