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Author Noer, Ilman M. ♦ Wulandari, Pramesti A. D.
Source Directory of Open Access Journals (DOAJ)
Content type Text
Publisher EDP Sciences
File Format PDF
Date Created 2018-09-17
Copyright Year ©2018
Language English ♦ French
Subject Domain (in LCC) TA1-2040
Subject Keyword Engineering (General) ♦ Technology ♦ Civil engineering (General)
Abstract Aluminium alloy 7050 is widely used for aerospace applications due to its excellent mechanical properties. However, when the airplane is operated and exposed by the corrosive environment, alumina layer of aluminium is not thick enough to provide protection. Therefore, corrosion protection method in the airplane needs to be improved. In the recent experiments, corrosion process in the airplane could be inhibited by corrosion inhibitors that are mixed with a protective coating. In this current study, the effect of sodium chromate inhibitor on the corrosion rate of aluminium alloy AA 7050 has been investigated. The 7050 aluminium alloys in this experiment were machined into specimens for the tensile test, hardness test, corrosion test and metallographic examination. The corrosion test was performed in 3.5% NaCl solution containing 0.1%, 0.3%, 0.5%, 0.7% sodium chromate inhibitor and the results have been compared with the corrosion rate in 3.5% NaCl solution as reference. The tensile test results showed that the ultimate and yield strength were 527.36 MPa and 481.42 MPa. Hardness test results were 175.36 VHN on the short transverse plane, 164.43 VHN on the long transverse plane, and 164.23 VHN on the longitudinal plane. This experimental study can be concluded that the corrosion rate of material decreases with increasing of Na2CrO4 concentration in the solution.
ISSN 2261236X
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Learning Resource Type Article
Publisher Date 2018-01-01
e-ISSN 2261236X
Journal MATEC Web of Conferences
Volume Number 197
Starting Page 12002


Source: Directory of Open Access Journals (DOAJ)