ANALISIS KETAHANAN LAJU KOROSI MATERIAL AL 7075-T651 DENGAN VARIASI PELAPISAN INHIBITOR

ABDUL KHOLIK, M. (2018) ANALISIS KETAHANAN LAJU KOROSI MATERIAL AL 7075-T651 DENGAN VARIASI PELAPISAN INHIBITOR. Skripsi thesis, Institut Teknologi Dirgantara Adisutjipto.

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Abstract

Aluminum 7075-T651 been applied widely in the aircraft industry because it has the advantages of lightweight, high ductility, and corrosion resistance. One way to improve the corrosion resistance of aluminum is by the addition of inhibitor on the aluminum surface. There are several types of inhibitors are used in the world of aircraft maintenance in accordance consumable material Data (CMD), among others: LPS 3, CRC SP400, and ARDROX AV30. This research aims to study and determine the rate of corrosion resistance of aluminum 7075- T651 material variation inhibitor coating. The research method is the inhibitor coating process variation using LPS 3, CRC SP 400, and ARDROX AV30 on each test specimen. Corrosion testing process using immersion techniques (Immerse) and based on ASTM standards ASTM G52 and G1. With seawater corrosive media and high concentrations of strong acid HCL. In this study showed that variation affects the rate of corrosion inhibitor coating on aluminum 7075-T651 material. Values corrosion rate of aluminum 7075-T651 in seawater corrosive media test specimens without coating inhibitor obtained a value of 0.314 mdd and test specimens are added variation LPS3 inhibitor coating, CRC SP 400 and AV30 ARDROX obtained 0 mdd, which means no corrosion occurs. And the efficiency of corrosion inhibitors on the rate of aluminum 7075-T651 in seawater corrosive media have optimal percentage value of 100%. While the rate of corrosion of the material value of 7075-T651 in the media corrosive strong acid HCL high concentrations of test specimens without coating inhibitor obtained a value of 1837.785 mdd and the rate of corrosion on test specimens with added ARDROX AV30 inhibitor capable of inhibiting the corrosion rate by 1217 04 mdd than the rate of corrosion of the test specimens are added CRC SP400 amounted to 1248.393 mdd and LPS 3 of 1289.74 mdd. While the inhibitor efficiency on aluminum 7075-T651 in the media corrosive strong acid HCL high concentrations of inhibitors ARDROX AV30 has a high percentage of 33% compared to the value of the CRC SP400 inhibitor efficiency of 32% and 29% of LPS.

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