Pengaruh Waktu Tahan Post-Heat Dan Cooling Rate Terhadap Struktur Mikro Dan Perilaku Ketahanan Korosi Baja Aisi 1006 Pada Proses Copperizing

Tatapangarsa, Iftitah (2016) Pengaruh Waktu Tahan Post-Heat Dan Cooling Rate Terhadap Struktur Mikro Dan Perilaku Ketahanan Korosi Baja Aisi 1006 Pada Proses Copperizing. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Tembaga merupakan salah satu unsur paduan yang ditambahkan pada low carbon steel pambahan tembaga dilakukan untuk meningkatkan ketahanan terhadap Atmosperic corrosion dengan membentuk lapisan oksida Cu2O dan Cu(OH)2, dalam penelitian ini dilakukan pemaduan tembaga dan baja AISI 1006 dengan mencelupkan baja AISI 1006 yang sebelumnya telah di pre-heat pada temparatur 900° C kedalam tembaga cair dengan waktu tahan variasi tahan 5, 10,15 dan 20 menit untuk memberikan waktu difusi, dilanjutkan dengan post-heat pada temperatur 1100°C di variasikan pendinginannya yaitu dengan metode Normalizing, Quenching pada media air dan Annealing. Kemudian dilakukan pengujian komposisi kimia dengan EOS, pengujian strukur mikro/makro, pengujian fasa dengan XRD dan pengujian laju korosi dengan pengujian Polarization Tafel. Didapat muncul nya struktur acicular ferrite, Widmanstatten Ferrite,dan Granular Ferrite pada pendinginan Quenching, muncul Widmanstatten Ferrite dan Polygonal Ferrite pada pendinginan Normalizing, dan muncul Polygonal Ferrite pada pendinginan Annealing. Dimana Proses copperizing menurunkan diameter butir dan post-heat menambah diameter butir.Terjadi penurunan nilai Corrosion rate untuk baja AISI 1006, penambahan waktu post-heat semakin menurunkan nilai corrosion rate, dengan nilai corrosion rate rendah 6.489 mpy pada Baja AISI 1006 copperizing dengan post-heat 20 menit pendinginan quenching. ============================================================ Copper is one of the alloying elements that are added to the low carbon steel pambahan copper to improve the reliability of the atmosperic corrosion by forming a layer of oxide Cu2O and Cu (OH) 2, in this study the integration of copper and steel AISI 1006 by dipping the steel AISI 1006 previously has been in pre-heat at the temperature of 900 ° C into the molten copper holding time variation resistant 5, 10,15 and 20 minutes to give the diffusion time, followed by post-heat at a temperature of 1100 ° C in varying cooling is by the method Normalizing, Quenching in water and Annealing. Then testing the chemical composition with EOS, the test structure of micro / macro, testing and testing phases by XRD corrosion rate with Tafel Polarization testing. Her structure appears obtained acicular ferrite, Widmanstatten Ferrite and Granular Ferrite on cooling Quenching, appeared Widmanstatten Polygonal Ferrite and Ferrite on cooling Normalizing, and appeared Polygonal Ferrite on cooling Annealing. Where copperizing process lowers grain diameter and post-heat add grain Diameter impairment Corrosion rate on steel AISI 1006, the addition of post-heat time is increasingly reducing the corrosion rate, the lower value of corrosion rate 6.489 mpy on AISI 1006 Steel copperizing with post- 20 minutes quenching.

Item Type: Thesis (Undergraduate)
Additional Information: RSMt 660.284 4 Tat p
Uncontrolled Keywords: copperizing, AISI 1006, Corrosion, Copper, diffusion, microstructure, Atmospheric Corrosion, HSLA, Weathering steel, Hardening, Accicular Ferrite
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General) > TA462 Metal Corrosion and protection against corrosion
Divisions: Faculty of Industrial Technology > Material & Metallurgical Engineering > (S1) Undergraduate Theses
Depositing User: EKO BUDI RAHARJO
Date Deposited: 25 Oct 2019 09:43
Last Modified: 25 Oct 2019 09:43
URI: http://repository.its.ac.id/id/eprint/71426

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