Maulana, Ravi (2019) Pengaruh Solution Treatment terhadap Laju Korosi Magnesium (Mg) Sebagai Anoda Tumbal Korosi Baja API 5L X65. Sarjana thesis, Universitas Brawijaya.
Abstract
Pipa gas/ minyak biasanya akan terjadi fenomena korosi dan korosi inilah penyebab mahalnya biaya perbaikan pada pipa tersebut. Metode proteksi katodik biasanya diterapkan untuk melindungi pipa tersebut dari korosi. Anoda tumbal merupakan salah satu dari metode proteksi katodik dengan cara menggunakan anoda untuk ditumbalkan yang berfungsi untuk melindung katoda. Magnesium banyak digunakan sebagai anoda tumbal pada baja API 5L X65 dikarenakan lebih mudahnya terkorosi dengan memiliki potensial oksidasi lebih tinggi. Proses solution treatment pada magnesium dari penelitian ini memiliki variasi temperatur 350⁰C, 400⁰C, dan 450⁰C dengan holding time selama 1 jam, 2 jam, dan 3 jam. Selanjutnya spesimen diuji kekerasan dan laju korosi menggunakan metode elektrokimia dan metode weight loss. Hasil laju korosi metode elektrokimia diukur dengan Potensiodinamik Autolab PGSTAT 204 dengan menggunakan software NOVA 1.11 dan laju korosi metode weight loss diketahui dengan menimbang masa yang hilang menggunakan moisture analyzer MOC – 120H. Berdasarkan data hasil penelitian didapatkan bahwa pada spesimen tanpa perlakuan memiliki laju korosi paling tinggi. Dengan solution treatment laju korosi paling tinggi terdapat pada temperatur 450⁰C dengan holding time selama 3 jam dan laju korosi paling rendah terdapat pada temperatur 350⁰C dengan holding time selama 1 jam. Semakin tinggi temperatur solution treatment dan semakin lama holding time maka kekerasan semakin menurun menyebabkan laju korosi semakin tinggi. Dengan temperatur yang optimal dan holding time yang optimal yaitu pada temperatur 350⁰C dan holding time selama 1 jam memiliki nilai kekerasan paling besar oleh karena itu ketahanan terhadap korosinya juga tinggi.
English Abstract
Gas/ oil pipes will usually occur corrosion and corrosion phenomena is the cause of the high cost of repairs on the pipe. Cathodic protection methods are usually applied to protect the pipe from corrosion. The sacrificial anode is one of the cathodic protection methods by using an anode to be sacrificed which serves to protect the cathode. Magnesium is widely used as a sacrificial anode in API 5L X65 steel because it is easier to corrode by having a higher oxidation potential. The solution treatment process in magnesium from this study has a temperature variation of 350⁰C, 400⁰C, and 450⁰C with a holding time of 1 hour, 2 hours and 3 hours. Furthermore, the specimens were tested for hardness and corrosion rate using electrochemical methods and weight loss methods. The results of the corrosion rate of the electrochemical method were measured by Potentiodynamic Autolab PGSTAT 204 using NOVA 1.11 software and the corrosion rate of the weight loss method was known by weighing the lost period using the MOC-120H moisture analyzer. Based on the results of the research data, it was found that the untreated specimens had the highest corrosion rate. With the solution treatment, the highest corrosion rate is found at a temperature of 450⁰C with a holding time of 3 hours and the lowest corrosion rate is at a temperature of 350⁰C with a holding time of 1 hour. The higher the temperature of the solution treatment and the longer the holding time the hardness decreases causing the corrosion rate to be higher. With the optimal temperature and optimal holding time, at 350⁰C and holding time for 1 hour, the greatest hardness is therefore high resistance to corrosion.
Other obstract
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| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | SKR/FT/2019/493/051905089 |
| Uncontrolled Keywords: | Magnesium (Mg), Baja API 5L X65, Solution Treatment, Korosi, Kekerasan. Magnesium (Mg), API 5L X65 Steel, Solution Treatment, Corrosion, Hardness. |
| Subjects: | 600 Technology (Applied sciences) > 620 Engineering and allied operations > 620.1 Engineering mechanics and materials > 620.11 Engineering materials > 620.112 Properties of materials and nondestructive testing |
| Divisions: | Fakultas Teknik > Teknik Mesin |
| Depositing User: | Budi Wahyono Wahyono |
| Date Deposited: | 30 Oct 2020 13:32 |
| Last Modified: | 09 Feb 2023 03:05 |
| URI: | http://repository.ub.ac.id/id/eprint/172952 |
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