科研之友
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摘要
The corrosion behavior of nitride-coated titanium alloys VT1-0, OT-4, and VT-14 in 80% aqueous solution of sulfate acid is studied. The coatings were formed with graphite baking and without it in commercially pure nitrogen under atmospheric pressure and in the rarefied medium (1 Pa) at 750-1000 degrees C for 5-20 h. It was found that the coatings have high protective properties. Anodic behavior of nitride layers depends on a nitride phase ratio in the coating, their stoichiometry, and surface profile and imperfection, which are determined by formation conditions of coatings (temperature, exposure, nitrogen pressure, and other parameters of the technological medium). It is shown that saturation in a two-component medium (molecular nitrogen and graphite charging) improves the electrochemical characteristics of nitride coatings not affecting their structural and phase state.
- 出版日期2008-2
