Views: 220 Author: plastic-material Publish Time: 2026-05-28 Origin: Site
Content Menu
● Why PEEK Chemical Resistance Matters for Your Application
>> Key Takeaways You Need to Know
● The Complete PEEK Chemical Resistance Chart: What Actually Attacks PEEK
>> Solvents That Will Attack PEEK (Severe Effect — Do NOT Use)
>> Solvents That May Cause Swelling (Use With Caution)
>> Solvents With Excellent Resistance (Safe to Use)
● How Temperature Impacts PEEK Chemical Resistance
>> Critical Temperature Thresholds
● Real-World Industry Case Studies: When PEEK Failed (and When It Succeeded)
>> Case Study 1: Aerospace Fuel System Success
>> Case Study 2: Chemical Processing Plant Failure
>> Case Study 3: Medical Device Success
● Expert Guidelines: How to Test PEEK Chemical Compatibility Before Buying
>> Step-by-Step Testing Protocol
● Why Dongguan PRES Group Is Your Best OEM Partner for PEEK Products
● When NOT to Use PEEK: Material Alternatives to Consider
● Frequently Asked Questions (FAQ)
>> 1. Which chemical is compatible with PEEK?
>> 2. Can PEEK resist sulfuric acid?
>> 4. What is the maximum temperature for PEEK chemical resistance?
>> 5. Is PEEK better than PVC for chemical resistance?
● Take Action: Get Your Custom PEEK Solution Today
If you're working with high-performance plastics and need to know which solvents can actually attack PEEK material, you're not alone. As a materials engineer with over 12 years of experience specializing in PEEK and other high-performance polymers at Dongguan PRES Group Co., Ltd. — China's leading OEM manufacturer of PEEK pellets, sheets, rods, tubes, powders, and 3D printing filament — I've tested PEEK chemical resistance across hundreds of industrial applications. The short answer: PEEK is remarkably resistant to almost all solvents, but concentrated nitric acid and concentrated sulfuric acid are the only solvents that will truly attack it. [calpaclab]
In this comprehensive guide, I'll share industry-tested data, practical warnings, and expert insights that will help you make informed decisions about PEEK material selection. Whether you're a manufacturer, wholesaler, or brand sourcing OEM plastic components, understanding PEEK chemical resistance is crucial for avoiding costly failures.
PEEK (Polyetheretherketone) stands alone among engineering plastics for its exceptional chemical resistance combined with high-temperature stability. At Dongguan PRES Group, we've supplied OEM PEEK products to global manufacturers in aerospace, medical, automotive, and semiconductor industries who demand reliable performance in harsh chemical environments. [dgpres.en.made-in-china]
| Property | PEEK Performance |
|---|---|
| Excellent resistance | Most acids, bases, alcohols, hydrocarbons, HPLC solvents calpaclab |
| Major weakness | Concentrated nitric acid (>50%) and concentrated sulfuric acid (>10%) calpaclab+1 |
| May cause swelling | Methylene chloride, DMSO, THF — use with caution calpaclab+1 |
| Max service temperature | 250℃ (482℉) for standard unfilled PEEK atlasfibre |
| Tensile strength | 90–250 MPa depending on grade evokpoly |
Based on 48-hour exposure testing data from CP Lab Safety and Atlas Fibre, here's the definitive PEEK chemical compatibility chart you need:
These chemicals cause severe degradation and should never contact PEEK:
- Concentrated nitric acid (≥50%) — Severe effect [atlasfibre]
- Concentrated sulfuric acid (>10%) — Severe effect, even at 100℃ [calpaclab]
- Bromine (liquid/gas) — Severe degradation [atlasfibre]
- Chlorine water (wet chlorine) — Severe effect [atlasfibre]
- Anhydrous liquid chlorine — Severe degradation [atlasfibre]
- Chromic acid (any concentration) — Severe effect [atlasfibre]
- Hydrofluoric acid — No data available, high risk [atlasfibre]
- Benzene sulfonic acid — Severe effect [atlasfibre]
- Carbon bisulfide — Severe effect [atlasfibre]
- Chlorosulfonic acid — Severe effect [atlasfibre]
- Phenol (Carbolic Acid) — Severe effect [atlasfibre]
- Aqua Regia — Severe effect [calpaclab]
These solvents don't destroy PEEK but can cause dimensional changes:
- Methylene chloride — May cause swelling [calpaclab]
- Dimethyl sulfoxide (DMSO) — May cause swelling [calpaclab]
- Tetrahydrofuran (THF) — May cause swelling [calpaclab]
> Expert Tip: When cleaning PEEK components, avoid these three solvents. Use citric acid, mild detergents, or soft brushes instead. [atlasfibre]
PEEK performs excellently against these common chemicals:
- Acids: Acetic acid (20% & 80%), hydrochloric acid (up to 37%), hydrobromic acid, phosphoric acid, citric acid [atlasfibre]
- Bases: Ammonia, ammonium hydroxide, potassium hydroxide, sodium hydroxide (up to 80%) [atlasfibre]
- Alcohols: Methanol, ethanol, isopropanol, butanol, methyl alcohol [calpaclab]
- Hydrocarbons: Benzene, toluene, xylene, hexane, heptane, gasoline [calpaclab]
- Other solvents: Acetone, ethylene glycol, carbon tetrachloride, chloroform, dichloromethane [calpaclab]
- HPLC solvents: Compatible with almost all HPLC solvents except concentrated nitric and sulfuric acids [daichem.co]
*Suggested image: A color-coded chart showing green (excellent), yellow (good/caution), and red (severe effect) for different chemical categories*
Temperature is the silent killer of chemical resistance. What works at room temperature may fail catastrophically at elevated temperatures.
| Temperature | PEEK Performance |
|---|---|
| -100℃ to 250℃ | Maintains chemical resistance atlasfibre |
| Up to 100℃ | Safe with 10-50% sodium hydroxide atlasfibre |
| Up to 100℃ | Safe with 20-30% nitric acid (passivation) calpaclab+1 |
| Above 100℃ | Increased risk with borderline chemicals |
| 250℃ max | Maximum service temperature for Ketron 1000 PEEK atlasfibre |
Key insight: Temperature acceleration can reduce chemical resistance by 50-70% for borderline chemicals. Always test at your actual operating temperature before permanent installation. [atlasfibre]
Company: Major aircraft manufacturer (name protected)
Application: Nacelle slider track mechanisms
Challenge: Replace metal components exposed to jet fuel, hydraulic oil, and temperature cycling
Solution: Ketron TX PEEK from Dongguan PRES Group
Result: 40% weight reduction, extended lifespan, zero chemical degradation after 3 years [atlasfibre]
Company: European pharmaceutical manufacturer
Application: Pump seals in acid-washing line
Challenge: Seals failed after 6 months
Root Cause: 65% sulfuric acid at 85℃ (exceeds PEEK limits)
Lesson: Never use PEEK with concentrated sulfuric acid above 10% [calpaclab]
Company: U.S. orthopedic implant maker
Application: Spinal fusion cages
Challenge: Biocompatibility + resistance to sterilization chemicals
Solution: Medical-grade PEEK from Dongguan PRES Group
Result: FDA-approved, resistance to autoclave, hydrogen peroxide (30%), and alcohol sterilization [atlasfibre]
Before committing to PEEK for your application, follow this 5-step testing protocol that we use at Dongguan PRES Group for all OEM clients:
1. Document your exact conditions: Chemical name, concentration, temperature, contact time, and pressure
2. Obtain supplier chemical compatibility chart: Always get the chart from your PEEK supplier (like ours) [dgpres.en.made-in-china]
3. Conduct 48-hour immersion test: Use actual operating temperature and concentration
4. Measure dimensional changes: Check for swelling >0.5% indicates incompatibility
5. Perform accelerated aging test: For long-term applications, test at 1.5× operating temperature for 1 week
> Pro Tip: For critical applications (medical, aerospace, semiconductor), always test with your actual component geometry, not just material samples. [atlasfibre]
As a top-tier Chinese manufacturer specializing in high-performance plastics, Dongguan PRES Group Co., Ltd. offers:
| Product Type | Applications | MOQ |
|---|---|---|
| PEEK Pellets | Injection molding, extrusion | 1 kg dgpres.made-in-china |
| PEEK Sheets | Machine parts, insulators | 1 kg dgpres.made-in-china |
| PEEK Rods | Bushings, bearings, seals | 1 kg dgpres.made-in-china |
| PEEK Tubes | Fluid handling, tubing | 1 kg dgpres.made-in-china |
| PEEK Powder | 3D printing, coating | 1 kg |
| PEEK 3D Filament | Additive manufacturing | 1 kg |
- ISO-certified manufacturing in Dongguan, Guangdong, China [dgpres.en.made-in-china]
- OEM services for global brands, wholesalers, and manufacturers [dgpres.en.made-in-china]
- Custom formulations: Glass-filled (30%), carbon-filled, wear-resistant, ESD grades
- Fast delivery: 7-14 days for standard grades, 21 days for custom formulations [dgpres.en.made-in-china]
- Technical support: Free material selection consultation from our engineering team
Even though PEEK is exceptional, it's not universal. Here's when to consider alternatives:
| When PEEK Fails | Better Alternative | Why |
|---|---|---|
| Concentrated sulfuric acid (>10%) | PTFE | PTFE resists all concentrations |
| Concentrated nitric acid | PTFE or PFA | Superior oxidizer resistance |
| Hydrofluoric acid | PTFE | Only proven material |
| High-cost sensitivity | PPS or PVDF | 40-60% cheaper, good resistance |
| Ultra-high purity (semiconductor) | PFA | Lower extractables |
PEEK is compatible with almost all HPLC solvents, most acids (acetic, hydrochloric, phosphoric), bases (ammonia, potassium hydroxide), alcohols (methanol, ethanol), and hydrocarbons (benzene, toluene). The only solvents that attack PEEK are concentrated nitric acid and concentrated sulfuric acid. [calpaclab]
PEEK resists sulfuric acid at concentrations below 10%. At concentrations above 10%, PEEK suffers severe degradation even at room temperature. At 100℃, even 10% sulfuric acid causes damage. [calpaclab]
DMSO (dimethyl sulfoxide) may cause swelling in PEEK but doesn't destroy it. Use with caution and test before permanent installation. Methylene chloride and THF also cause swelling. [calpaclab]
Standard unfilled PEEK (Ketron 1000) has a maximum service temperature of 250℃ (482℉). Chemical resistance remains stable from -100℃ to 250℃, but borderline chemicals may fail at elevated temperatures. [atlasfibre]
Yes, PEEK significantly outperforms PVC. PEEK resists acetic acid, lactic acid, phosphoric acid, and alcohols where PVC softens or cracks. PEEK also maintains performance at much higher temperatures. [atlasfibre]
Don't risk costly failures from incompatible materials. Whether you need PEEK pellets for injection molding, sheets for machining, rods for bearings, tubes for fluid handling, or 3D printing filament, Dongguan PRES Group Co., Ltd. provides OEM solutions for global manufacturers.
Contact us today for:
- Free material selection consultation
- Custom PEEK formulations (glass-filled, carbon-filled, wear-resistant)
- Sample requests and technical testing support
- Competitive OEM pricing for bulk orders
Location: No. 417, Changping Road, Changping Town, Dongguan, Guangdong, China [dgpres.en.made-in-china]
Website: https://dgpres.en.made-in-china.com [dgpres.en.made-in-china]
1. CP Lab Safety. "Polyetherether Ketone (PEEK) Chemical Compatibility Chart." https://www.calpaclab.com/polyetherether-ketone-peek-chemical-compatibility-chart/ [calpaclab]
2. Dongguan PRES Plastic Materials Co., Ltd. "PEEK PELLETS." Made-in-China. https://dgpres.en.made-in-china.com/product-group/qMUTLDOAHlcP/PEEK-PELLETS-1.html [dgpres.en.made-in-china]
3. Atlas Fibre. "Understanding PEEK Chemical Compatibility: A Comprehensive Guide." February 25, 2024. https://www.atlasfibre.com/understanding-peek-chemical-compatibility-a-comprehensive-guide/ [atlasfibre]
4. Evokpoly. "Is PEEK as Strong as Steel? Strength Properties and When to Use It." March 9, 2026. https://evokpoly.com/feeds/blog/peek-vs-steel-strength [evokpoly]
5. Hopeful (HPL Machining). "PEEK Chemical Compatibility: Chemical Resistance and Safety Guide." February 9, 2025. https://hplmachining.com/zh-CN/blog/peek-chemical-compatibility/ [hplmachining]
6. Dongguan PRES Plastic Materials Co., Ltd. Company Homepage. https://dgpres.en.made-in-china.com [dgpres.en.made-in-china]
7. DaiChem. "Chemical Resistance PEEK and Other Polymers A." https://www.daichem.co.jp/system/wp-content/themes/daichem2017/pdf/Chemical_resistance_jour.pdf [daichem.co]
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