Thickness Gauge Selection Guide.
a. Copper and chromium layers on plastics: It is recommended to use a Coulomb method thickness gauge (which will damage the coating) or an Measurement).
b. Galvanized layer on metal parts: For example, an economical magnetic induction method thickness gauge (non-destructive measurement) should be used on the steel substrate. For other metal substrates, use a Coulomb thickness gauge (which will destroy the coating) or an X-ray thickness gauge (non-destructive measurement).
c. For electrophoretic paint on iron substrate, the paint should use an economical magnetic induction method thickness gauge (non-destructive measurement). For electrophoretic paint on other metal substrates, the paint should use an economical eddy current method thickness gauge (non-destructive measurement).
d. Dry film refers to the cured paint coating.
e. Refer to items 2 and 1 for the chromium plating layer.
f. The only way to spray paint on interior and exterior parts of the car is to use the wedge method (PIG, which will damage the coating). The ultrasonic method (non-destructive measurement) can measure coatings above 10 microns, but sometimes it cannot be measured.
g. Price: 0.6 to 30,000 for magnetic induction method and eddy current method; 0.8 to 60,000 for Coulomb method; 55 to 60,000 for ultrasonic method; 250,000 to 400,000 for X-ray thickness gauge.
