Do titanium containers need pickling and passivation?
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I would like to ask whether titanium containers need to be pickled and passivated?
Generally, titanium containers do not require pickling and passivation. Because titanium has the ability to protect itself, it forms a dense oxide layer in the air that prevents reactions between titanium and other substances, thereby protecting the surface of titanium products from oxidation or corrosion. However, if there is obvious dirt or foreign matter on the surface of the titanium container, or if a higher surface finish is required, acid cleaning and passivation can be considered. .
Under normal circumstances, chemical pickling and passivation are carried out inside the container
Could you explain the reason? Thank you
The manufacturer will do this; pickling can remove contaminants, oxide scale, and other impurities, thereby improving the ability to detect defects.
During the manufacturing process, the surface of the titanium plate can be contaminated with weld slag splatter, oil stains, rust, footprints, and hand prints. After pickling, these residues are removed, and an antioxidant passivation film is formed on the metal surface.
This post was last edited by wanlirn on 2023-6-24 at 14:01. Hehe, pickling and passivation are essential, especially for welds. Which company can guarantee that its welds are completely white? If there’s even a slight blue tint, they need to be pickled. . . . During the manufacturing process, contact with iron is inevitable; without pickling, it will rust as soon as it is exposed to moisture upon leaving the factory. So, we also carry out pickling even when the users don’t request it. . . In the past decade, many industry experts have requested that titanium equipment be delivered in its original condition, without any polishing or pickling; once the equipment passes the acceptance tests, the client is responsible for cleaning it themselves. . . . .
Source: www.autopv.cn, Professional intelligent Q&A on pressure vessels
Are there any standard specifications for the pickling and passivation of equipment? For example, what materials must be pickled and passivated.