Analisis Pengaruh Variasi Temperatur Annealing dan pH Media Elektrolit terhadap Laju Korosi Titanium pada Larutan Cairan Tubuh Sintetis

Gunawan, Erfina Arfianti (2023) Analisis Pengaruh Variasi Temperatur Annealing dan pH Media Elektrolit terhadap Laju Korosi Titanium pada Larutan Cairan Tubuh Sintetis. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Implan ortopedi telah banyak meningkatkan kualitas hidup manusia yang membutuhkan penggantian pada bagian tulang. Keberhasilan material implan bergantung pada ketahanan korosi, kekuatan yang sesuai dengan pembebanan dari aktivitas serta tidak menimbulkan efek toksisitas. Titanium based memiliki keunggulan karena karakteristiknya yang memiliki ketahanan korosi yang sangat baik, inert terhadap tubuh, berat jenisnya yang rendah dan biokompatibilitasnya yang baik. Dalam dunia medis paduan titanium yang banyak dipelajari adalah Ti-6Al-4V namun paduan ini melepaskan ion vanadium dan aluminium yang berbahaya bagi tubuh manusia sehingga banyak pembaharuan penelitian paduan titanium untuk menggantikan material ini. Ti-Al-Mn merupakan paduan titanium yang belum banyak dipelajari untuk pengaplikasian biomedis. Ketahanan korosi dari paduan titanium dihasilkan dari pembentukan lapisan oksida yang sangat stabil, kontinu, sangat melekat, dan protektif pada permukaan logam karena lapisan oksida terbentuk secara spontan ketika terkena udara atau lingkungan yang lembab. Annealing dengan pendinginan udara dilakukan untuk meningkatkan kekerasan dari material. Struktur mikro dan alpha case yang terbentuk diamati melalui mikroskop. Metode karakterisasi seperti pengujian SEM, XRD, XRF dilakukan pada spesimen sebelum dan sesudah perlakuan panas. Perlakuan panas annealing pada temperatur 650 oC, 700 oC, 760 oC menghasilkan kekerasan dan jumlah porositas pada permukaan oksida yang meningkat seiring dengan peningkatan temperatur. Pengujian korosi berupa polarisasi potensiodinamik, EIS, dan weightloss, menggunakan media elektrolit larutan Hank’s dengan variasi pH 5, 7 , dan 9 serta pada temperatur konstan 37oC. Pada penelitian ini laju korosi terendah pada variasi temperatur annealing adalah 650oC pada pH 9 yaitu sebesar 0,0006263 mm/yr sedangkan laju korosi tertinggi pada variasi temperatur 760oC pada pH 5 yaitu sebesar 0,0107040 mm/yr. Penurunan nilai pH larutan menyebabkan peningkatan laju korosi yang terjadi sedangkan peningkatan porositas akibat peningkatan temperatur menyebabkan elektrolit masuk melalui celah oksida sehingga meningkatkan laju korosi
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Orthopedic implants have improved the quality of life for people who need bone replacement. The effectiveness of an implant material depends on its corrosion resistance, strength that matches the loading from the activity and no toxicity effects. Titanium based have advantages due to its characteristics of excellent corrosion resistance, inert to the body, low specific gravity and good biocompatibility. In the medical field, a widely studied titanium alloy is Ti-6Al-4V, but this alloy releases vanadium and aluminum ions that are harmful to the human body, so there is a lot of renewal of titanium alloy research to replace this material. Ti-Al-Mn is a titanium alloy that has not been widely studied for biomedical applications. The corrosion resistance of titanium alloys results from the formation of a highly stable, continuous, adherent and protective oxide layer on the metal surface as the oxide layer forms spontaneously when exposed to air or a humid environment. Air cooling annealing was performed to increase the hardness of the material. The microstructure and alpha case were observed through microscope. Characterization methods such as SEM, XRD, XRF testing were performed on specimens before and after heat treatment. Annealing heat treatment at temperatures of 650 oC, 700 oC, and 760 oC produced hardness and the amount of porosity on the oxide surface which increased with increasing temperature. Potentiodynamic polarization, EIS, and weightloss corrosion behavior tests were conducted using Hank's solution electrolyte media with pH variations of 5, 7, and 9 and kept constant at 37 oC. In this study, the lowest corrosion rate was at annealing temperature 650oC at pH 9 which is 0.0006263 mm/yr while the highest corrosion rate at 760 oC at pH 5 is 0.0107040 mm/yr. A decrease in the pH value of the solution causes an increase in the corrosion rate that occurs while the increase in porosity due to an increase in temperature causes the electrolyte to enter through the oxide gap thus increasing the corrosion rate.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Annealing, Laju Korosi, Polarisasi Potensiodinamik, Titanium. Annealing, Corrosion Rate, Polarization Potensiodynamic, Titanium.
Subjects:	T Technology > T Technology (General) > TA404 Materials--Biodegradation T Technology > TA Engineering (General). Civil engineering (General) > TA418.75 Corrosion-resistant materials T Technology > TA Engineering (General). Civil engineering (General) > TA462 Metal Corrosion and protection against corrosion
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Erfina Arfianti Gunawan
Date Deposited:	24 Jul 2023 08:13
Last Modified:	24 Jul 2023 08:13
URI:	http://repository.its.ac.id/id/eprint/99124

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