According to media reports, the global thermal spray coating market will be about 78 billion yuan in 2020, and it will continue to grow. Thermal spraying is a surface strengthening technology and an important part of surface engineering technology. Due to the performance advantages of thermal spraying coatings such as wear resistance, corrosion resistance, low toxicity, temperature resistance, and electrical properties, it has always been the focus of promotion in my country New technology projects.

Can a coating thickness gauge measure the thickness of thermal spraying?

The answer is yes, but it is necessary to analyze the spraying machine mechanism. The current market is for different scenarios and different materials to choose which thickness gauge to choose. Let's talk about the principle of thermal spraying, where it is used, and what kind of coating thickness gauge should be used to measure it.

The principle of thermal spraying ？

It uses some kind of heat source (such as electric arc, plasma spraying or combustion flame, etc.) to heat powdered or filamentous metal or non-metallic materials to a molten or semi-molten state, and then spray it at a certain speed with the help of flame itself or compressed air The surface of the pretreated substrate is deposited to form a technology of surface coating with various functions.

Where are thermal spraying used ?

The raw materials used for spraying are aluminum, zinc, polypropylene, epoxy resin and other materials, which can be seen to be dominated by metals. It is mainly used for non-magnetic coatings on various magnetic metal substrates and non-conductive coatings on non-magnetic metal substrates. Ceramics is the substrate with the highest proportion of thermal spray coatings, and metal is the second largest proportion of thermal spray coatings. Large substrate.

What coating thickness gauge should be used to measure the thickness of the thermal spray coating 

Analysis of Workpiece Structure of Thermal Spray Coating

Metal matrix thermal spraying metal raw materials

For this kind of workpiece, the value can also be measured with magnetic and eddy current coating thickness gauges, but they are often inaccurate, so it is not recommended. This type of work often uses destructive coating thickness measurement methods, namely telephone line thickness measurement, Ray thickness gauge, metallographic microscope thickness gauge. This type of identification is often bulky and expensive, and the hype process is relatively complicated.

Non-metallic raw materials for thermal spraying of metal substrates

The most common magnetic coating thickness gauge and eddy current thickness gauge can be used to measure this kind of workpiece. This type of coating thickness gauge can be non-destructive, fast, small in size, low in price, and easy to operate.

It can be measured in principle, but it still depends on the structure of the workpiece, such as magnetic and eddy current coating thickness gauges, which often have requirements for the workpiece to be measured. Take the Guoou GTS8202 coating thickness gauge as the base material of the measured object. The thickness should not be less than 0.4mm, the surface unevenness range of the measured point of the workpiece should be within 5mm, and the minimum volume of the measured surface should not be less than 10mm*10mm. If your company has measurement needs, you may wish to contact our Goou Instrument, let us know about it and provide a measurement plan for free.