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    Home > Coatings News > Paints and Coatings Market > Coating process: Determination of moisture and heat resistance of coating film

    Coating process: Determination of moisture and heat resistance of coating film

    • Last Update: 2020-04-03
    • Source: Internet
    • Author: User
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    It is suggested that the wet heat resistance of paint film refers to the resistance of paint film to high temperature and high humidity environment

    1

    Instrument and equipment: temperature and humidity regulating box meeting the test conditions

    2

    Test sampling: take representative samples of coating products to be tested (or each product in the coating system)

    3

    Make the experiment sample: Select the base material with the size of 150 mm × 70 mm × 1 mm

    Dry (or bake) each coated test plate under specified conditions and place it for specified time

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    1

    Instrument and equipment: temperature and humidity regulating box meeting the test conditions

    2

    Test sampling: take representative samples of coating products to be tested (or each product in the coating system)

    3

    Make the test sample: select the base material with the size of 150 mm × 70 mm × 1 mm

    Dry (or bake) each coated test plate under specified conditions and place it for specified time

    Unless otherwise specified, the test panel shall be conditioned for at least 16 hours at a temperature of (23 ± 2) ℃ and a relative humidity of (50 ± 5)%

    4

    Experimental steps: (1) The test panel is suspended vertically on the shelf, and the front of the test panel is not allowed to contact with each other

    Put the shelf into the temperature and humidity regulating box with the temperature adjusted to (47 ± 1) ℃ and the relative humidity adjusted to (96 ± 2)% in advance, or other agreed temperature and humidity can be used

    When the temperature and humidity reach the set value, the test time shall be calculated, and no condensation shall occur on the surface of the test panel during the test

    (2) Check once for 48h in continuous test, and once every 72h after two checks

    After each check, the position of test plate shall be changed

    (3) The fingerprint must be avoided during the inspection of the test panel, and it shall be compared with the Standard Version under sufficient light or light, and the result shall be subject to the same level among the three test panels

    (4) The damage phenomenon caused by the edge around the test plate, within 5mm around the plate hole and external factors shall not be inspected

    (5) Test time: time agreed by both parties; stop index agreed by both parties

    5

    Results: rust, bubble, discoloration, cracking or other damage were evaluated

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