Treatment permukaan baja karbon untuk ketahanan korosi menggunakan teknik hot-dip aluminizing

Ramdhani, Wahyu (2018) Treatment permukaan baja karbon untuk ketahanan korosi menggunakan teknik hot-dip aluminizing. Diploma thesis, UIN Sunan Gunung Djati Bandung.

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Abstract

Telah dilakukan percobaan mengenai pelapisan baja karbon untuk ketahanan korosi menggunakan metode hot-dip aluminizing. Dilakukan preparasi bahan meliputi pemotongan, pengamplasan, pemolesan dan pengetsaan. Pada proses hot-dip aluminizing, waktu pencelupan plat baja divariasikan selama 10 dan 60 detik dengan panas tungku sebesar 700℃. Sebagai perbandingan hasil analisis hot-dip aluminizing dibedakan berdasarkan perbedaan perlakuan pada sampel plat baja. Pada sampel 1, plat baja tidak dipoles dan dietsa sedangkan sampel 2, plat baja dipoles dan dietsa. Karakterisasi dilakukan menggunakan Mikroskop Optik dan SEM-EDX (Scanning Electron Microscope - Energy Dispersive X-Ray Spectrometry) dan uji korosi menggunakan alat Galvanostat. Didapat hasil ketebalan lapisan intermetalik atau paduan FeAl pada sampel 1 sebesar 10μm dan sampel 2 sebesar 58μm. Perbedaan ketebalan lapisan intermetalik dipengaruhi oleh waktu pencelupan dan banyaknya kandungan karbon pada sampel. Didapat nilai laju korosi sampel 1 sebesar 15,1 mpy dan sampel 2 sebesar 17,41 mpy. Nilai laju korosi dipengaruhi oleh ketebalan lapisan intermetalik pada sampel. Has conducted experiments on carbon steel coating for corrosion resistance using hot-dip aluminizing method. Has been prepared includes cutting, grinding, polishing and etching. On etching processing, On aluminizing process, given dip time is 10 and 60 second and temperature of furnace is 700℃. As a comparison of analytical hot-dip aluminizing differentiated by difference in treatment on the sample of carbon steel plate. Sample 1, carbon steel plate has not been polished and etched.while sample 2, carbon steel plate has been polished and etched. Characterization was permormed using Optical Microscope and SEM-EDX (Scanning Electron Microscope - Energy Dispersive X-Ray Spectrometry) and corrotion test was using Galvanostat. The result of thickness of intermetalic or alloy FeAl on sample 1 is 58μm and sample 2 is 10μm. The difference in the thickness of the intermetallic layer is influenced by the dipping time and the amount of carbon content in the sample. The corrosion rate of sample 1 is 15,1 mpy and sample 2 is 17,41 mpy. The rate of corrosion rate is influenced by the thickness of the intermetallic layer on the sample.

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