Optical microscope: use an optical microscope to enlarge the coating, and observe and measure the thickness of the coating.

Electron microscope: use electron microscope to enlarge the coating at high magnification, so as to observe and measure the thickness of the coating.

Scanning electron microscope: the coating surface is imaged by scanning electron microscope with high resolution, so as to accurately measure the coating thickness.

Metallographic microscope: Magnify the metal coating by metallographic microscope, and accurately observe and measure the thickness of the coating.

X-ray fluorescence spectrometry: the element content in the coating is measured by X-ray fluorescence spectrometry, and then the thickness of the coating is calculated.

Atomic force microscope: Atomic force microscope is used to image the coating surface at atomic level, so as to accurately measure the coating thickness.

Timely crystal microbalance: Measure the coating quality with timely crystal microbalance, and then calculate the coating thickness.

Resistance method: measure the resistance value of the coating by resistance method, and then calculate the thickness of the coating.

Eddy current method: the coating is measured by eddy current method, and its thickness is calculated by the resistance value of the coating.

Choose the appropriate method to measure according to different situations.