ASTM C813 Standard Test Method for Hydrophobic Contamination on Glass by Contact Angle Measurement

    Introduction to ASTM C813

    This test method describes a method for evaluating hydrophobic contamination on glass surfaces through contact angle measurements. The test determines the interaction between water droplets and glass, providing insights into surface cleanliness and contamination levels. A higher contact angle generally indicates a more hydrophobic surface, while a lower angle suggests contamination or insufficient hydrophobic treatment. This method is widely used in industries requiring precision glass surfaces, such as optics, automotive, and electronics. The test significance lies in its ability to assess surface modifications and cleanliness, ensuring optimal performance for applications where water repellency and transparency are crucial. By maintaining uniform procedures, ASTM C813 facilitates consistency in quality assessments and performance validation.

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    Get Certified ASTM C813 for Reliable Testing of Hydrophobic Contamination on Glass

    ASTM C813 certification is given to ensure that hydrophobic contamination on glass is properly assessed using accurate contact angle measurement techniques. Certified processes enhance the testing of the glass contamination and the predictable safety of its use in products.

    Scope of ASTM C813 

    • It gives a complete evaluation of the properties of glass surfaces, such as wettability and optical performance.
    • Tests glass that is mixed with chemicals or is enhanced.
    • Tests glass that is covered with hydrophobic treatments made of fluoropolymer.
    • Tests of surgical glass surfaces are coated with silicone

    ASTM C813 Equipment and Sample Preparation

    Specimen DetailsThe specimens include glass panels, lenses, or coated glass surfaces requiring hydrophobic evaluation.
    Specimen DimensionsSpecimens are typically flat glass sheets or similar surfaces prepared to standard dimensions to facilitate uniform testing.
    Specimen PreparationMortar is prepared with specific ratios of cement, sand, and water, then mixed thoroughly and placed in molds.

    Applications of ASTM C813 

    • Car motive windows and windshields.
    • Touchscreen panels and electronic displays.
    • Lenses and optics of the camera.
    • Glazing systems of architecture.
    • Glass products that are coated and treated.

    ASTM C813 Common Challenges and Troubleshooting

    Surface cleaning should be carried out in a consistent manner; otherwise, measurements of contact angle will be inconsistent. Misplaced droplets or rough surfaces can cause distortion of results. A problem with the optical measurement system can be a misalignment or incorrect calibration that can lead to a wrong angle. To achieve quality results, it is necessary to adhere to cleaning procedures and calibrate instruments.

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    ASTM A1065 Aggregate Testing Technique, Process, and Data Collection

    ASTM C813 is used to measure the hydrophobic state of glass surfaces based on the measurement of the contact angle. The method of the test is aimed at the interaction of regulated water droplets with the glass cover to discern the performance of the surface treatment and the cleanliness.

    ASTM C813 Testing Procedure and Requirements

    SamplePreparationGlass samples are cleaned to remove any debris or previous treatments, ensuring an uncontaminated starting surface.
    Contact Angle MeasurementA tiny water droplet is placed on the glass surface, and the contact angle is measured using an optical instrument.
    Data RecordingMeasurements are repeated across different surface areas to ensure consistency and accuracy.

    ASTM C813 Results and Interpretation

    The outcomes are in the form of contact angle values in degrees. The angle of contact is high and therefore suggests that the surface is hydrophobic and repels water well, whereas the angle of contact is low and the occurrence of a hydrophilic behavior is due to contamination or degradation of the surfaces. Such measurements are essential in the justification of cleaning processes, evaluating the performance of hydrophobic treatments, and adherence to the performance requirement. 

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    ASTM C813 Problem and Solution

    Problem: Inconsistent contact angle measurements and unreliable assessment of hydrophobic performance may occur due to the situation of surface contamination, improper cleaning, or improper alignment of instruments.

    Solution: Standardize cleaning protocols, standardize the placement of droplets, and calibrate optical measuring devices on a regular basis to obtain consistent and repeatable contact angle measurements.

    Measurement of the contact angle itself is fast and normally done in a couple of minutes per specimen. Nevertheless, cleaning of surfaces and inventories and instrument calibration can raise the overall test time.

    Expert

    The optical measuring instrument needs to be operated by a trained laboratory technician or materials specialist who has to be able to put water droplets into place and interpret contact angle data more accurately.

    Cost

    It is a moderate to high price, depending on the equipment availability.

    FAQ

    Where can I get the astm c813 tested?
    You can share your astm c813 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm c813 test to various testing techniques.
    Please contact us for a detailed quote for your astm c813 testing needs. Cost incurred to carry out different astm c813 testing methodology depends on the type of raw material; number of samples, coupons, or specimens; test conditions, turn around time etc. Costs of some ASTM testing methods start from $100 and the final value depends upon the factors listed above. Please contact us for the best and latest prices.
    The required number of samples or specimens should comply with the procedure given in the astm c813 standard. However, the MaTestLab operations team can assist you for your special requirements once you share your testing details with us.
    MaTestLab has a vast testing laboratory network, hence we bring you the best testing facilities in a cost-effective way. We offer considerable discounts (15-20%) to our returning customers based on test volume and frequency.
    The turnaround time for astm c813 test methodology depends upon the test procedure mentioned in the standard test document. However, we at MaTestLab understand your research requirements and hence try to get your test completed within the least possible time.
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