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In which media is titanium prone to galvanic corrosion when in contact with other metals? How to avoid or reduce this type of corrosion?

According to different media, the galvanic corrosion of titanium can be divided into two categories: the first type is media such as salt solution, nitric acid, acetic acid, and seawater. Titanium has excellent corrosion resistance in this type of media. If it interacts with another metal, the oxide film on the surface of titanium makes it reactive, ensuring that it becomes the cathode in the galvanic couple, causing galvanic corrosion in the other metal that forms an anode; The second type of medium, such as hydrochloric acid, sulfuric acid, and acetic acid, may contain titanium in both active and passive states. If it comes into contact with other metals, it may increase the corrosion rate of both titanium and other metals. To avoid or reduce galvanic corrosion caused by titanium in contact with other metals, the following measures are usually taken:

a. Add completely isolated insulation material between two metals to avoid the formation of corrosive batteries;

b. Avoid corrosive batteries with large cathodes and small anodes formed between two metals;

c. Open the distance between different metals and change their positions to avoid cathode contamination;

d. Adopt cathodic protection, etc.

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