A pinhole is a very small defect present in paints and coatings due to the entrapment of moisture, air, solvents or dust particles in accordance with AS 3894.2, ASTM D5162, ASTM G6, ASTM G62, BS 7793-2, ISO 8289, ISO 14654, JIS K 6766, NACE RP 0188, NACE SP 0188, and NACE TM0384 standards.
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