1988 Fiscal Year Final Research Report Summary

Kinetic Study on Corrosion Behavior of Al-Li-X Alloys in High Temperature Water.

Research Project

Project/Area Number	62550509
Research Category	Grant-in-Aid for General Scientific Research (C)
Allocation Type	Single-year Grants
Research Field	金属材料(含表面処理・腐食防食)
Research Institution	Muroran Institute of Technology
Principal Investigator	HIDEO Sugawara Muroran Inst. of Tech. Faculty of Eng. Profs., 工学部, 教授 (80002814)
Project Period (FY)	1987 – 1988
Keywords	Al-Li / Al-Li-Mg and Al-Li-Si alloys / anodic polarization curve / immersion tests in high temperature ionized water / corrosion resistance
Research Abstract	Corrosion behavior of Al-Li-X (X; Mg and Si) alloys were investigated by means of potentiodynamic polarization in 0.5M-NaCL solution and immersion tests in high temperature deionized water. Good correspodence exists between the anodic behavior and immersion tests. Al-1 2% Li and Al-4%Mg-2%Li alloys exhibited good corrosion resistance than pure Al.Of the additional alloying elements investigated, Mg appears to have the benifical effects. However, it is not possible to directly substitute Mg for Al-Li alloys in order to maintain corrosion resistance, as those alloys with high Li contentsand more prone to attack. This anormolous corrosion behavior of high Li alloys was interpreted in terms of the dealloying mechanism causing preferential corrosion of Li.

(4 results)