Characteristics of Hot-dip Zinc Coating Measurement

After performing comparative coating thickness measurements using magnetic. coulometric and profilographic methods it has been determined that the coating thickness value obtained by the magnetic method is lower than the actual value, measured by the profilographic method. The measurements of hot-dip coatings with a thickness of 15-20 μm using a magnetic coating thickness gauge have shown that the measurement error may reach 32 %. An introduction of a correction factor equal to 1.3 was proposed.