Deoxidizing and pickling of titanium rods and alloys

September 15, 2023

In the middle of heat treatment and after heat treatment most of the requirements for surface treatment in order to remove the metal surface oxide skin and various contaminants, reduce the activity of the metal bare surface, as well as in titanium and its alloys surface halogen coating protective layer and various functional coatings before and during the coating process, the application of such coatings is to improve the performance of the metal surface, for example, to prevent corrosion, oxidation and wear and tear, and so on.

　　The conditions of pickling of titanium rods and their alloys are determined by the type (characteristics) of the oxidized and existing reactive layers, which in turn are influenced by the high-temperature heating process and the increase in processing temperatures (e.g., forging, casting, welding, etc.). At low processing temperatures or high heating temperatures below 600X: only a thin oxide layer is generated, and at high temperatures an oxygen-rich diffusion zone is formed in the vicinity of a certain oxide layer, which must also be removed by pickling. Different methods of oxide removal can be used: mechanical methods for removing thick oxide layers and hard surface layers, oxide removal in molten salt baths and pickling in acid solutions to remove the oxide layer.

　　In many cases it is possible to use a combination of several methods, e.g. a combination of mechanical removal of the oxide layer followed by pickling, or a combination of salt bath followed by pickling, but in the case of oxidized and diffused layers formed at higher temperatures a special method is used, but oxidized layers formed at high temperatures of up to 600X: can be removed in most cases by a general pickling. However, most of the oxide layer formed at high temperature up to 600X: can be dissolved by general pickling.

Author:

Mr. Shen

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shenguanlun9696@gmail.com

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+86 13709173123