What Chemicals Are Harmful to Rubber Seals?

What Chemicals Are Harmful to Rubber Seals?

Citrus cleaners can be effective and are much safer for your employees than the solvent alternative.  It's a good transition step away from having solvent cleaners in your plant.  Unfortunately, citric acid can have a very negative, long-term effect on your equipment.

GlueGuard's selection of products from Gard Chemicals are solvent-, and citrus-free.  They are the safest alternative for your employees and equipment.  The best part is that they are extremely effective cleaners and release agents.

For more information, please review the below article by Brian Baer of sciencing.com posted on January 09, 2018:

There are many types of rubber seals.

Synthetic rubber is used in a variety of industrial applications, including seals and gaskets. Rubber seals are high performance materials with excellent thermal and chemical properties. However, due to the nature of synthetic polymers, the correct rubber seal must be selected for certain chemical services. Synthetic rubber seals can include Nitrile (Buna-N), Viton Fluoroelastomoer, EPDM Rubber and PTFE (Teflon).

 

Oils, Greases and Gasoline

Gasoline is harmful to EPDM rubber seals.

Petroleum-based hydraulic oils and greases contain a variety of long chain hydrocarbon components. These chemicals have extremely adverse effects on EPDM rubber seals and can actually dissolve the material. Buna-N is best suited for use with these petroleum-based chemicals but is not recommended for brake fluid (glycol ethers). Ethers are a group of chemicals that are harmful to Viton seals. Gasoline also has moderate effects on EPDM rubber and certain fuels are not recommended for Viton.

Acids

Organic acids are harmful to Viton seals.

Acids are chemical compounds with a pH less than 7.0. PH is a measure of the hydrogen ions present in a solution which are available to attack and degrade materials. Organic acids contain carbon and mineral acids contain elemental metals. Acetic acid is a strong organic acid and is harmful to Viton and Buna-N rubber seals. Hydrochloric acid, hydrofluoric acid and sulfuric acid attack and degrade Buna-N rubber. The preservative benzoic acid is detrimental to EPDM rubber seals.

Alkalis

Hydroxides can cause corrosion and damage rubber seals.

Alkalis are chemical compounds with a pH of greater than 7.0 and have high numbers of hydroxide ions present in solution. Anhydrous ammonia is not typically classified as an alkali but does have a high pH and is harmful to Viton rubber seals. Magnesium hydroxide is a weak alkali and is not recommended for Buna-N rubber applications. Sodium hydroxide is a strong alkaline base and is harmful to Buna-N rubber seals, especially at elevated temperatures.




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