Is dichloromethane corrosive to PVDF?
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As the title suggests, is dichloromethane corrosive to PVDF? I’ve looked up some information – some sources say it’s not corrosive, while others claim it is. Does anyone have experience using it?
Dichloromethane is somewhat corrosive to PVDF, but it can be used at room temperature.
Dichloromethane is a gas at normal conditions; if PVDF is simply in contact with dichloromethane gas at room temperature and pressure, no corrosion will occur. However, since dichloromethane is easy to liquefy, if liquid dichloromethane comes into prolonged contact with PVDF, it will cause swelling of the PVDF, similar to the process of soaking gelatin sheets. This leads to changes in the physicochemical properties of PVDF products, such as their strength, hardness, sealing properties, and rheological characteristics, and they are no longer suitable for their original conditions and environments.