15/05/2024
Method for measuring coating thickness and paint film thickness of color-coated coils.
For the detection of color-coated steel coils, we give a simple detection and calculation method to help buyers who have not yet understood how to detect quality.
Tools required: Magnetic coating detector.
First, use salt and scouring pad to remove the coating on the surface of the color plate (wipe carefully to prevent damage to the coating), then use a magnetic thickness gauge to measure the thickness of the coating, measure three points on the same plate surface, and take the average
Zinc layer weight calculation method
The weight of the coating can be calculated from the thickness of the coating measured by the magnetic thickness gauge. The specific calculation formula is as follows:
(1) Coating weight of galvanized sheet = coating thickness × 7.3 × 2. For example, if the test thickness is 12.32, then the coating weight is 12.32 × 7.3 × 2 = 180 grams/square meter;
(2) Coating weight of galvanized sheet containing 15% aluminum = coating thickness × 6.8 × 2. For example, the test thickness is 11.03, then the coating weight is 11.03 × 6.8 × 2 = 150 grams/square meter;
(3) Coating weight of galvanized plate containing 55% aluminum = coating thickness × 5.2 × 2. For example, the test thickness is 14.42, then the coating weight is 14.42 × 5.2 × 2 = 150 g/m2.
Coating thickness measurement
After detecting the thickness of the coating, use the same method to detect the total thickness of the coating and coating. Measure three points on the same plate and take the average. The thickness of the coating can be calculated by subtracting the coating thickness from the total thickness. For example, the total thickness of the coating and coating measured by a magnetic thickness gauge is 36 microns, and the coating thickness is 11 microns, then the coating thickness is 36- 11=25 microns.
The above is the measurement method of zinc layer and paint film of prepainted steel coil.
At Shandong Oulan Steel, we support all orders to undergo quality inspection by our customers.Ensuring product quality is the most important principle for us to gain a foothold in the global market.
To learn more about steel products, please do not hesitate to contact us.
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