ANALISIS PROTEKSI PADA LOGAM ALUMUNIUM STACK PEM FUEL CELL MENGGUNAKAN INHIBITOR ARABIC GUM DI LINGKUNGAN ASAM KLORIDA

MUTHALIB, ABDUL (2017) ANALISIS PROTEKSI PADA LOGAM ALUMUNIUM STACK PEM FUEL CELL MENGGUNAKAN INHIBITOR ARABIC GUM DI LINGKUNGAN ASAM KLORIDA. S1 thesis, Universitas Mercu Buana Jakarta.

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Abstract

Arabic Gum is known to be used as a corrosion inhibitor, especially in an acidic environment (HCl). This study used 1100 (99%) aluminum metal with variation of 1%, 2%, and 3% arabic gum inhibitors on hydrochloric acid (HCl) concentration medium 0,5M. This study obtained the efficiency of arabic gum inhibitors on aluminum metal against hydrochloric acid (HCl) media of 92.83%. Tests with electrochemical method, obtained the highest current of 4.01 × 10〗 1 cm (- 6) A / cm2 inhibitor and the lowest current of 1.43 × 10〗 3 cm (- 6) A / cm2 inhibitor. In SEM results with 500x magnification showing aluminum surface morphology with 3% immersion inhibitor partly partially well protected area but in certain area begin to form oxide layer and pitting corrosion (Pitting Corrosion). At 5-day immersion the surface undergoes oxidation layer formation as well as uniform corrosion structure based on the duration of the immersion. Keywords: Aluminum, Arabic Gum, Inhibitor, Corrosion Arabic Gum diketahui dapat digunakan sebagai inhibitor korosi, terutama dalam lingkungan asam (HCl). Penelitian ini menggunakan logam alumunium 1100 (99%) dengan variasi inhibitor arabic gum 1%, 2%, dan 3% pada media larutan asam klorida (HCl) konsentrasi 0,5M. Penelitian ini memperoleh efisiensi inhibitorarabic gum pada logam alumunium terhadap media asam klorida (HCl) sebesar 92,83%. Pengujian dengan metode elektrokimia, didapat arus tertinggi sebesar 4,01× 10−6A/cm2 inhibitor 1% dan arus terendah 1,43× 10−6A/cm2 inhibitor 3%. Pada hasil SEM dengan pembesaran 500x menunjukan morfologi permukaan alumunium dengan inhibitor 3% perendaman 1 hari sebagian area terlindung dengan baik namun pada area tertentu mulai terbentuk lapisan oksida dan terbentuk lubang-lubang (PittingCorrosion). Pada perendaman 5hari permukaan mengalami pembentukan lapisan oksidasi serta struktur pemetaan merata (Uniform Corrosion) berdasarkan lamanya waktu perendam. Kata kunci: Alumunium, Arabic Gum, Inhibitor, Korosi

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