1. PEEK can withstand almost any chemical except fuming concentrated sulfuric acid, and it can maintain good chemical stability even at higher temperatures. It has strong resistance to chemical corrosion and is usually used to manufacture parts that work in harsh environmental conditions or need to withstand frequent disinfection (such as chemical storage tanks and medical devices that need to be disinfected with strong oxidant hydrogen peroxide).

2. Although PEEK polymer has been widely recognized as a material that can withstand extremely strong chemical corrosion, of course, whether PEEK can withstand a certain corrosive medium is also related to the crystallinity of the PEEK parts, the residual internal stress, and the temperature and concentration of the medium the parts are in contact with. For details, please refer to the following table (because the file is relatively large, please download and view):

3. PEEK’s chemical corrosion resistance is divided into the following three categories:

A: No corrosion, trace or no absorption;

B: Slight corrosion, whether it is suitable depends on the application;

C: Severe corrosion, cannot be used in situations where these chemicals are present.

4. Please see the attachment for the corrosion resistance of PEEK polymer to various organic and inorganic solvents:

The attachment contains detailed performance data on PEEK’s resistance to various solvents, which can be specifically queried in the following categories:

◇ Corrosion resistance of PEEK polymer to various alkalis;

◇ Corrosion resistance of PEEK polymer to various alcohols;

◇ Corrosion resistance of PEEK polymer to various aldehydes and ketones;

◇ Corrosion resistance of PEEK polymer to various esters;

◇ Corrosion resistance of PEEK polymer to various ethers;

◇ Corrosion resistance of PEEK polymer to various organic chlorides;

◇ ◇ Corrosion resistance of PEEK polymers to various hydrocarbons; ◇ Corrosion resistance of PEEK polymers to various inorganic reagents; ◇ Corrosion resistance of PEEK polymers to other reagents; ◇ Corrosion resistance of PEEK polymers to organic nitrogen compounds; ◇ Corrosion resistance of PEEK polymers to phenols; ◇ Corrosion resistance of PEEK polymers to sulfides.