The hindrances caused by ice and snow accretion are the serious problems in railways and also in the other traffics. For the mitigation of these hindrance three types of coating materials, which have ice and snow repellent capability, were developed. For the evaluation of the paractical application, various tests, such as UV-dew cycle, distilled water immersion, oil immersion and monitoring tests by using actual train were conducted. Durabilities of coatings were assessed by characterizing surface and physical properties, such as contact angles, adhesion forces of ice and snow and mechanical properties with a elapse of the test times.
Results revealed, that each material except a series of #20 hardly changed the force of ice adhesion as a criterion of ice repellent capability and mechanical properties, whereas the adhesion forces of snow increased with the test times. These tendencies were in agreement with that of monitoring tests. Further investigations of the mitigation capabilities against accidents and durabilities of the coatings for the railways, by using actual trains are continued.

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Facile method for the evaluation of antioxidants (AO) in ethyl linoleate has been discussed. In the early stage of autooxidation of ethyl linoleate, all absorbed oxygen changed into hydroperoxides (ROOH) which increased in proportion to aged time. To evaluate antioxidants an ethyl linoleate solution containing 0.5% sample was aged at 63°C for 16 hours, and the peroxide value (POV) of the solution was determined. The inhibitory activity of AO to peroxidation of ethyl linoleate reflects its antioxidant activity.

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