抄録
Abrasion tests in vacuum and in gasses of hydrogen and nitrogen have been carried out in order to find the influence of oxidation, and to compare the results with the data obtained from the similar tests in the air.
Specimens of 0.7% Carbon Steel have been tested by an Amsler abrasion testing machine, and the following facts have been found. The wear in nitrogen and hydrogen gases is several times greater than that in the air. As the, degree of vacuum becomes higher and the degree of oxidation lowers, the wear loss gradually increases, the maximum wear loss being reached at the vacuum of nearly 0.1mm Hg. This maximum wear loss in 0.1mm Hg vacuum is greater than the loss in the hydrogen or nitrogen gas and it is, of course, very much greater than that in the Air. When, however, a still higher degree of vacuum than 0.1mm Hg., is attained an abrupt change takes place in the abrasion of test pieces, the wear suddenly decreasing much less than that in the air.
