Herdiadi, Muhammad (2019) Analisa Pengaruh Variasi Konsentrasi Larutan Elektrolit Zinc Chloride Acid terhadap Ketebalan, Kekuatan Lekat, dan Ketahanan Korosi Baja AISI 1020 dengan Metode Elektroplating. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Baja karbon rendah, termasuk AISI 1020, adalah salah satu tipe baja yang banyak digunakan pada industri maupun kehidupan sehari-hari contohnya untuk komponen tiang listrik, roda gigi, mur, rangka kendaraan, dan juga pada perkapalan. Pelapisan pada baja banyak diterapkan untuk meningkatkan nilai estetika dan melindungi benda kerja dari ancaman lingkungan yang dapat menyebabkan korosi pada material tersebut. Salah satu metode pelapisan yang umum digunakan adalah elektroplating yaitu penempatan logam lain pada permukaan logam induk yang akan dilindungi dengan ditambahkan bahan kimia dan bantuan arus listrik. Seng adalah salah satu logam yang sering digunakan untuk melapis baja dengan metode elektroplating karena bersifat proteksi anodik terhadap baja, mudah didapatkan dan harganya relatif murah. Dalam penelitian ini diteliti variasi nilai konsentrasi beberapa zat-zat penyusun larutan elektrolit Zinc Chloride Acid yakni ZnCl2 (40; 55; 70 gr/liter) dan KCl (155; 175; 195 gr/liter) yang digunakan dalam proses elektroplating seng. Spesimen hasil penelitian diuji ketebalan lapisannya dengan alat Dry Film Thickness, kemudian diuji kekuatan lekat lapisannya dengan metode pull-off test menggunakan alat PosiTest AT-M Adhesion Tester, lalu spesimen tersebut diuji laju korosinya dengan metode weight loss menggunakan metode immersion corrosion testing of metals dan dilihat struktur permukaan lapisan tersebut menggunakan Scanning Electron Microscope. Hasil penelitian menunjukkan penambahan konsentrasi ZnCl2 dan KCl pada larutan elektrolit Zinc Chloride Acid meningkatkan ketebalan lapisan coating hingga dapat mencapai nilai ketebalan maksimal sebesar 35,83 ±0,25 µm namun menurunkan kekuatan lekat lapisan coatingnya dengan perolehan nilai kekuatan lekat maksimum sebesar 15,34 ±0,01 MPa. Selain itu, penambahan konsentrasi ZnCl2 dan KCl pada larutan elektrolit Zinc Chloride Acid juga menurunkan nilai laju korosi pada spesimen uji dengan perolehan nilai laju korosi paling lambat sebesar 0,014087 ±0,0034 mmpy.
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Low carbon steel, including AISI 1020, is one type of steel which is widely used in industrial and everyday life, for example for components of electric poles, gears, nuts, vehicle frames, and also in shipping. Coating on steel is widely applied to increase the magnificence and gives protection to workpieces from environmental threats which can cause corrosion. One of the coating methods is electroplating, it is the placement of other metals on the surface of the workpiece which will be protected by adding chemicals and electrical current. Zinc is one of the metals which is often used for coat steel with electroplating methods because it gives anodic protection, high availability and it is relatively cheap. This paper analyze the variation of the concentration of ZnCl2 (40; 55; 70 gr / liter) and KCl (155; 175; 195 gr / liter) which compose the Zinc Chloride Acid electrolyte solution used in the zinc electroplating process. The specimens’ coating thickness were tested use Dry Film Thickness apparatus, then the coating’s adhesive strength was tested using the pull-off test method using the PosiTest AT-M Adhesion Tester apparatus, then the specimens’ corrosion rate were tested using the weight loss method using the immersion corrosion testing of metals and the structure of the coated specimen’s surface is seen using the Scanning Electron Microscope. The results showed that the addition of concentrations of ZnCl2 and KCl in the Zinc Chloride Acid electrolyte solution increased the thickness of the coating layer with a maximum thickness of 35.83 ±0.25 µm but it also lowered the coating adhesive strength with a maximum adhesive strength value of 15.34 ±0.01 MPa. In addition, the addition of concentrations of ZnCl2 and KCl in the Zinc Chloride Acid electrolyte solution also reduced the corrosion rate value in the specimens with the lowest corrosion rate of 0.014087 ±0.0034 mmpy.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSMt 671.732 Her a-1 2019 |
| Uncontrolled Keywords: | Baja AISI 1020, Elektroplating, Kekuatan Lekat, Ketebalan, Korosi, Larutan Elektrolit Zinc Chloride Acid |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA418.74 Corrosion and anti-corrosives T Technology > TA Engineering (General). Civil engineering (General) > TA418.75 Corrosion-resistant materials T Technology > TA Engineering (General). Civil engineering (General) > TA418.9.C57 Coatings |
| Divisions: | Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Muhammad Herdiadi |
| Date Deposited: | 29 Apr 2024 08:08 |
| Last Modified: | 29 Apr 2024 08:08 |
| URI: | http://repository.its.ac.id/id/eprint/64684 |
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