Dry Chlorine reaction with Titanium Grade 2 1

[dogbertcountry2]

I am looking for information on ths subject. I have found much literature saying that the reaction is violent and the application is not a good one, but I am trying to investigate an incident and would like to hear details and descriptions of any experiences with the reaction.

 

[Shmulik]

As you've mentioned about a violent reaction, it is exactly stated in Handbook of Compressed Gases (CGA 4th edition, page 322).

At the following link you may free download TIMET Corrosion Handbook:

http://www.timet.com/coresistframe.html

Please refer to page 2.
You may inquire their technical support regarding amount of moisture is necessary to maintain passivity of the titanium.

 

[kenvlach]

"Chlorine Gas
Titanium is widely used to handle moist or wet chlorine gas, and has earned a reputation for outstanding performance in this service. The strongly oxidizing nature of moist chlorine passivates titanium resulting in low corrosion rates. Proper titanium alloy selection offers a solution to the possibility of crevice corrosion when wet chlorine service temperatures exceed 155°F. (70°C.).

Dry chlorine can cause rapid attack of titanium and may even cause ignition if moisture content is sufficiently low. However, as little as one percent water is generally sufficient for passivation or repassivation after mechanical damage to titanium in chlorine gas under static conditions at room temperature."

http://www.titanex.com/tiabout/spec...resistance-fabrication-applications.php?sel=7

"CHLORINE GAS
Titanium is widely used to handle moist chlorine gas and has earned a reputation for outstanding performance in this service. The strongly oxidizing nature of moist chlorine passivates titanium resulting in low corrosion rates in moist chlorine. Dry chlorine can cause rapid attack on titanium and may even cause ignition if moisture content is sufficiently low (Table 2)^(3). However, one percent of water is generally sufficient for passivation or repassivation after mechanical damage to titanium in chlorine gas under static conditions at room temperature (Figure 1)^(4). Factors such as gas pressure, gas flow, and temperature as well as mechanical damage to the oxide film on the titanium, influence the actual amount of moisture required. Approximately 1.5 percent moisture is apparently required for passivation at 390 degrees F (199 degrees C).^(3) Caution should be exercised when employing titanium in chlorine gas where moisture content is low."

http://www.timet.com/view.asp?cnct=63&tab=#CHLORINEGAS