The surface tension of selected real steel grades and their wetting with alumina substrate in the temperature interval from the melting point to the temperature of 1600 °C were determined using the sessile drop technique. The effect of the major elements (carbon and chromium) on the surface properties of given steels was studied. Carbon and chromium contents were varied in the range of 0.077 - 0.411 wt. % and 0.046 -12.392 wt. %, respectively. It was shown that with an increasing content of both aforementioned components increased the surface tension of the investigated steels. The temperature dependencies of surface tension exhibit a steeper decrease at higher chromium contents. The contact angle of liquid steels with alumina substrate increased with increasing chromium content in the samples.Keywords: sessile drop method, surface tension, wetting angle, steels
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