The ASTM D870-20 standard specifies the use of the immersion method to test the water resistance of coatings. This test helps evaluate the performance of coatings under water immersion conditions and helps to predict their service life. The standard applies to quality control in coating development, specification acceptance and manufacturing to determine whether a coating system passes the water immersion test. The test results can be used to evaluate the water resistance of coatings and can be controlled and compared according to experimental conditions and procedures. In addition, the standard also indicates the selection of test equipment and the control method of test conditions to ensure the accuracy and repeatability of test results.
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