Even if engineering plastics are ideal for the chemical industry, thanks to their excellent chemical resistances, it is important to underline that every polymer bahaves differently when in contact with : acids, bases, solvents etc. Temperature causes a variation in the chemical resistance of engineering plastics. An increase of few degrees is enough to cause the corrosion of material which would normally resist the same chemical agent at 20 C. Sometimes solutions of more compounds act in a different way than the single products, that's to say , one engineering plastic can have no resistance against a solution of more compounds even if its resistance to the single chemical is good. In any case, after having checked the resistance of the chosen material in contact with the chemical agent , it's necessary to go on with an experimental check of the chemical resistance of the polymer ' s chemical resistance under operating conditions. The below schedule has got only an indicative meaning being divided into groups of chemical agents and without any considerations of the changes caused by temperature , UV rays or other variables . Our technical office and the one of our raw material suppliers could answer your questions about your application.
Attention: tha data refers at a temperature of 20 °C
| PA.6 | PA.66 | PA11 | POMc | POMh | PET | PEI | PSU | PVDF | PPS | PAI | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| weak acid | 1 | 1 | 1 | 1 | 1 | 3 | 3 | 3 | 3 | 3 | 3 |
| strong acid | 0 | 0 | 0 | 0 | 0 | 1 | 3 | 3 | 3 | 2 | 3 |
| weak alkali | 1 | 1 | 2 | 3 | 3 | 2 | 3 | 3 | 3 | 3 | 2 |
| strong alkali | 0 | 0 | 2 | 1 | 1 | 0 | 0 | 3 | 3 | 3 | 0 |
| PA.6 | PA.66 | PA11 | POMc | POMh | PET | PEI | PSU | PVDF | PPS | PAI | |
| coal chemicals | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 3 |
| aliphatic hydrocarbons | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 1 |
| ester ketonis | 3 | 3 | 3 | 3 | 3 | 2 | 0 | 3 | 2 | 3 | 0 |
| ethers | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 1 | 3 | 3 | 3 |
| PA.6 | PA.66 | PA11 | POMc | POMh | PET | PEI | PSU | PVDF | PPS | PAI | |
| chlorine solvents | 1 | 1 | 1 | 3 | 3 | 0 | 0 | 0 | 1 | 3 | 3 |
| alcohols | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 1 | 3 | 3 | 3 |
| inorganic solutions | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
MATERIALS WHICH DO NOT STAND TO: : |
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| PA.6 (PA66) |
Weak and strong acids - alkali - chlorinates - hydrogen peroxide - sodium hypochlorite - phenol - chloroform - cresol - aniline - resorcinol - ferric chloride | ||||||||||
| PA11 | Nitric acid - chromic acid - fluorine - chromium - bromine -aniline - acetic acid - acetic anhydride - formic acid - potassium permanganate - potassium nitrate | ||||||||||
| POM | Acids - chlorinates - ketonics - fluorites - chloroform | ||||||||||
| PET | Concentrated acids - strong alkali - water +80°C | ||||||||||
| PVDF | nitric acid, concentrated sulfuric acid - potassium hydroxide - UV chlorines fluorites,acetone, cyclohexanone, dimethyl acetamide, dimethyl formamide | ||||||||||
| PP | aliphatic hydrocarbons - coal chemicals - chlorinates | ||||||||||
| PE | strong acids - chlorinates | ||||||||||
| PSU | strong acids - coal chemicals - chlorinates - ketonics | ||||||||||
| PES | acetone - aniline - benzene chloride - chloroform - strong acids - chromic acid - hydrofluoric acid | ||||||||||
| PPO | aliphatic hydrocarbons - coal chemicals - chlorinates - ketonics | ||||||||||
| PPS | oxidant acids - nitric acid | ||||||||||
| ABS | weak and strong acids - coal chemicals - chlorinates - ketonics | ||||||||||
| PC | acids - alkali - hydrocarbons - chlorinates - alcohols - ketonics | ||||||||||
| PEI | halogenated hydrocarbons - methylene chloride - trichloroethylene | ||||||||||
These data are based on informations given by the manufacturers of raw materials and are supplied without any engagement from our part For other materials please get in touch directly with Omnia Plastica.