ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The laminated composite of Fe–Al alloy and CrMo steel was fabricated by clad rolling toprovide additional properties to the steel such as corrosion resistance, strength, and light weight.Three layered composite consisting of alloy/steel/alloy was succesfully fabricated using the processcondition to satisfy the criteria for simultaneous deformation of different materials. The fabricatedcomposite could be cold rolled to 120 μm thickness (99.8 % reduction), and wound to a coil withoutdamage. The corrosion resistance of the composite in a sulfuric acid solution was comparable tothat of monolithic CrMo steel, and it depends on the aluminium content of the Fe–Al alloy. Thealuminium content dependence of the corrosion behavior is explained by the corrosion potential(Ecorr) of the Fe–Al alloy derived from the polarization curves in the solution. In order to improvethe corrosion resistance of the composite, pre-oxidation treatment was conducted to form Al2O3layer to protect the substrate. Analyses by XPS and SIMS show that the Al2O3 oxide fractionincreases with the oxidization temperature and Al content of the alloy. The pre-oxidation treatmentimproved the corrosion resistance of the composite in a sulfuric acid solution. It is concluded thatthe effect of oxidation on the corrosion resistance is due to the formation of Al2O3 oxide and theAl2O3 fraction in the oxides
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.866.pdf
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