EXHAUST GASES, CONTAINING HYDROGEN CHLORIDE Resistant O-Rings and Seals

Hydrogen chloride, also known as hydrochloric acid, is a colorless, corrosive, and pungent-smelling gas. It is used in many industries such as in the production of fertilizers, in food production, and in the production of dyes. It is also used in the production of plastics, rubber, and pharmaceuticals.

Common types of failures when rubber is exposed to hydrogen chloride include oxidation, embrittlement, cracking, and discoloration. Oxidation occurs when the rubber reacts with oxygen in the air to form a tough, inflexible coating on the surface of the rubber. Embrittlement occurs when the rubber absorbs the hydrogen chloride, resulting in a decrease in flexibility and strength. Cracking can occur when the rubber is exposed to temperature fluctuations or when the rubber is exposed to UV light. Discoloration can occur when the rubber is exposed to the gas for an extended period of time, resulting in a yellow or green color.