1968 年 18 巻 9 号 p. 483-491
Aluminum corrosion induced by microbial contamination of jet fuel has become one of the most important troubles. The object of the present work is to study the corrosion of aluminum caused by the growth of fungi isolated from jet fuel system. Of the fungi isolated, Cladosporium resinae appeared to be the most predominant. Many kinds of filamentous fungi were obtained from slime of jet fuel, water layer of storage tank, and sludges on stringer and lower panel of integral fuel tank of YS-11 jet plane
Results obtained were as follows.
(1) After 330 day incubation, exfoliation and corrosion occurred with small blisters on the surface of aluminum alloy, 6061 specimen.
(2) The cross section of the 6061 specimen indicated that the corrosion pits by Cladosporium resinae were extensively evident thoughout the aluminum body.
(3) The specimens of high purity aluminum (1099 and 1100), anodized aluminum, and aluminum alloy 5052 were severely damaged by the attack of the fungus.
(4) An extruded bar of 1100 was also attacked by Cladosporium resinae. Corrosion pits began to develop after 30 day culture of the fungus.
(5) Large amounts of sludge deposits were found on the stringer and lower skin panel of the integral tank of YS-11 jet plane. Widespread corrosions were found in the area covered by the growth of the fungus.
(6) Discussions were also made over the development of tests for the effects of protective coatings.