Pengaruh Variasi Inhibitor Dan Konsentrasi Inhibitor Pada Baja ASTM A53 TERHADAP LAJU Korosi Di Lingkungan Laut Yang Mengandung CO2

Setiawan, Fahrul (2019) Pengaruh Variasi Inhibitor Dan Konsentrasi Inhibitor Pada Baja ASTM A53 TERHADAP LAJU Korosi Di Lingkungan Laut Yang Mengandung CO2. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Baja banyak digunakan untuk membuat berbagai fasilitas dalam proses didunia industri. Salah satunya yaitu baja ASTM A53 yang merupakan baja karbon rendah yang umum digunakan sebagai sistem perpipaan atau pipa penyalur di dalam kapal. Dalam penerapannya, peristiwa korosi sering terjadi yang mengakibatkan kegagalan. Korosi yang terjadi akibat gas CO2 yang terlarut sering terjadi pada internal pipa. Untuk mungurangi laju korosi pada internal pipa diperlukan penambahan inhibitor. Penelitian ini menganalisis inhibitor natrium nitrit, asam askorbat dan asam karboksilat yang munggunakan variasi konsentrasi 0, 100, 200 dan 300 ppm pada media perendamanya yaitu 3,5% NaCl yang mengandung CO2. Hasil Immersion Corossion Test menunjukan laju korosi spesimen dengan penambahan inhibitor natrium nitrit, asam askorbat dan asam karboksilat lebih rendah 8,233% - 41,659% dari spesimen tanpa inhibitor. Nilai efesiensi inhibisi pada inhibitor asam askorbat pada konsentrasi 200 ppm memiliki nilai tertinggi yaitu 91,77%. Kemudian jenis korosi pada hampir semua spesimen uji adalah korosi lokasi dan korosi seragam ============================================================== Steel is widely used to make facilities in processes in the industrial world. ASTM A53 steel is a low carbon steel that is commonly used as a piping system or a pipeline inside the ship. In its application, corrosion events often occur resulting in failure. Corrosion that occurs due to dissolved CO2 gas often occurs in the internal pipe. To reduce the corrosion rate on the internal pipe, additional inhibitors are needed. This study analyzed sodium nitrite, ascorbic acid and carboxylic acid as inhibitors with variations in the concentrations of 0, 100, 200 and 300 ppm in the medium of 3.5% NaCl containing CO2. The Immersion Corossion Test results showed the corrosion rate of the specimens with the addition of sodium nitrite, ascorbic acid and carboxylic acid inhibitors was 8.23% - 41.659% of the specimens without inhibitors. The value of inhibition efficiency on ascorbic acid inhibitors at a concentration of 200 ppm has the highest value of 91.77%. Then the type of corrosion in almost all test specimens is location corrosion and uniform corrosion.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Korosi, Baja ASTM A53, Natrium Nitrit, Asam Askorbat, Asam Karboksilat Immersion Corrosion Test, Laju Korosi
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering > TC1665 Offshore structures--Materials.
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User:	Setiawan Fahrul
Date Deposited:	26 May 2026 04:22
Last Modified:	26 May 2026 04:22
URI:	http://repository.its.ac.id/id/eprint/68603

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