Phenyl silicone is an organosilicon material with phenyl groups introduced into the dimethyl silicone rubber backbone. This disrupts the regularity of the molecular chain, lowering the crystallization temperature and glass transition temperature, resulting in excellent high and low temperature resistance. The following will provide a detailed analysis of phenyl silicone's corrosion resistance to acids, alkalis, and fuel oils.

Basic Properties of Phenyl Silicone
Phenyl silicone can be divided into three types based on the phenyl content:
Low-phenyl silicone rubber: 5-10% phenyl content offers optimal low-temperature resistance (maintains elasticity at -100°C).
Medium-phenyl silicone rubber: 10-20% phenyl content offers excellent flame retardancy.
High-phenyl silicone rubber: 30% or more phenyl content offers excellent radiation resistance.
The introduction of the phenyl group not only improves temperature resistance but also enhances the material's chemical stability, enabling it to maintain excellent performance even in extreme environments.

Phenyl silicone has limited corrosion resistance to strong acids (such as sulfuric acid and hydrochloric acid):
Strong acids react with silane bonds, destroying the molecular structure.
After immersion in a 10% sulfuric acid solution for 72 hours, the mass loss rate is less than 0.5%.
It has better corrosion resistance to concentrated hydrochloric acid than ordinary silicone rubber, but it will still be damaged by long-term exposure.
Specific acid resistance data varies depending on the phenyl content, with high-phenyl silicone performing better.
Research shows that phenyl silicone is stable in media with a pH of 2-12, but its performance deteriorates in more acidic environments.

Corrosion Resistance to Alkali
Phenyl silicone's corrosion resistance to strong alkalis (such as sodium hydroxide):
It reacts with silane bonds to form sodium silicate and water.
Alkali resistance is better than ordinary silicone rubber, but still limited.
Long-term use in a strong alkaline environment can lead to material performance degradation.
Specific alkaline resistance data has not yet been determined.
Silicone rubber generally has poor resistance to strong alkalis, and phenyl silicone has limited improvement in this regard.

Fuel Oil Corrosion Resistance
Phenyl silicone's corrosion resistance to fuel oils (such as gasoline and diesel):
The higher the phenyl content, the better the oil resistance.
It is resistant to non-polar solvents (such as toluene and xylene).
Caution should be exercised when used with aromatic hydrocarbon solvents.
Specific swelling rate data has not yet been determined.
The oil resistance of phenyl silicone is primarily due to the introduction of the phenyl group, which stabilizes its molecular structure.