Nylon Ozone Corrosion Test Chamber

Nylon Ozone Corrosion Test Chamber is a specialized equipment used to evaluate the aging resistance of nylon materials in an ozone environment. The following provides a detailed explanation from five dimensions: equipment principle, test objects, technical parameters, application scenarios, and selection points:

I. Equipment Principle and Test Purpose

Core Principle

By simulating a high-concentration ozone environment (typically 50-500pphm) combined with controllable temperature and humidity (temperature 25°C-65°C, humidity 50%-95% RH), accelerated aging tests are conducted on nylon materials. Ozone attacks the unsaturated structures in the molecular chains of nylon, leading to surface cracking, embrittlement, or performance degradation of the material.

Test Purpose

Predict the service life of nylon products (such as seals, pipelines, coatings) in ozone environments.

Verify whether the material complies with industry standards (e.g., GB/T 7762, ISO 1431, ASTM D1149).

Optimize material formulations or processes to enhance ozone resistance.

Technical Parameters of Ozone Aging Test Chamber:

1. Inner Chamber Dimensions: 500*600*500mm

2. Temperature Range: RT+10°C～80°C

3. Temperature Fluctuation: ≤±0.5°C

4. Temperature Uniformity: ≤2°C

5. Temperature Deviation: ±2°C

6. Heating Rate: Approximately 3°C/min   Non-linear

7. Ozone Concentration: 10～500pphm

8. Gas Flow Rate: 12～16mm/S

9. Ozone Sample Holder: Non-stretching type test sample holder

II. Test Objects and Typical Materials

Main Test Materials

Nylon (PA): Including PA6, PA66, PA12, etc., widely used in automotive pipelines, seals, electronic connectors, and other scenarios.

Other Polymer Materials: Rubber, silicone, elastomers (e.g., NBR rubber, EPDM rubber), plastics, coatings, etc.

III. Technical Parameters and Equipment Configuration

Core Parameters

Ozone Concentration: 50-500pphm (adjustable), some equipment supports 0-1000pphm.

Temperature Range: 0°C-70°C, temperature control accuracy ±0.5°C.

Humidity Range: 50%-95% RH (some equipment supports condensation simulation).

Stretching Mode: Static stretching (deformation rate 20%) or dynamic stretching (frequency 0.5Hz).

Sample Holder: 360-degree rotating sample holder to ensure uniform ozone contact.

Key Components

Ozone Generator: Uses UV lamps (low concentration) or silent discharge tubes (high concentration).

Temperature and Humidity Control System: PID microcomputer controller paired with a stainless steel multi-blade impeller mixing system.

Concentration Detection Device: Electrochemical or photochemical sensors with an accuracy of ±10%.

Chamber Material: Inner chamber made of SUS304 stainless steel, outer chamber made of A3 steel plate with spray coating, insulation layer made of high-density glass fiber cotton.

IV. Application Scenarios and Industry Standards

Typical Applications

Automotive Industry: Testing the ozone resistance of engine compartment seals and fuel pipelines.

Electronics and Electrical Appliances: Evaluating the aging resistance of outdoor equipment casings and connectors.

Aerospace: Verifying material stability under environmental conditions.

Compliant Standards

GB/T 7762-2003 "Rubber Test Method for Ozone Aging Resistance."

ISO 1431 "Determination of Ozone Resistance of Rubber."

ASTM D1149 "Standard Test Method for Rubber Deterioration in Ozone."

V. Nylon Ozone Corrosion Test Chamber Operation Key Points

Pre-Test Preparation

Check whether the power supply and gas source connections are normal, ensuring the ozone generator and temperature-humidity control system operate stably.

Set parameters such as ozone concentration, temperature, humidity, and stretching rate according to test standards.

Sample Installation

Static Test: Fix the sample on the sample holder, ensuring it is parallel to the airflow direction.

Dynamic Test: Adjust the dynamic turntable distance and stretching frequency based on sample dimensions, then start the stretching and rotation functions after installation.

Test Process Monitoring

Regularly observe surface changes of the sample and record data such as cracking and hardness changes.

Ensure stable environmental parameters inside the test chamber and avoid external interference.

Post-Test Handling

After the test, remove the sample for performance testing (e.g., tensile strength, elongation, hardness).

Clean the interior of the test chamber, turn off the power and gas sources, and perform equipment maintenance.