Applications of Ultrasonic Thickness Tester in Measuring Epoxy Paint And Anti-corrosion Paint Thickness

1.Main Characteristics of Asbestos Sheet

High Temperature Resistance

It can withstand 300-500℃ high temperature for a long time, and higher temperature for a short time, which means it is suitable for high-temperature environment.

Heat and Sound Insulation

Low thermal conductivity effectively blocks heat transfer, and sound-absorbing performance.

Chemical Resistance

Resistant to acid, alkali and organic solvents, suitable for chemical plants and other corrosive environments.

Insulation

Good electrical insulation performance, used in electric equipment protection.

Mechanical strength

The fiber structure enhances the tensile and compressive capacity, but the brittleness is high and easy to break.

2.Traditional Application Fields

Construction

Fireproof material: used in firewall, fire door and roof fireproof layer.

Heat and sound insulation: used as heat and sound insulation interlayer for roofs and walls.

Industrial equipment

High-temperature protection: heat-insulating wrapping material for boilers, pipelines and furnaces.

Sealing material: sealing gasket under high temperature and high pressure environment.

Transportation

Braking system: used in the past for automobile brake pads, clutch linings.

Ship fire protection: cabin bulkheads or engine compartment heat insulation.

Electricity and Chemical Industry

Electrical insulation boards: insulating parts in power distribution equipment.

Anti-corrosion lining: Chemical reaction vessel lining.

1.High Solid Epoxy Paint

Epoxy coating consists of epoxy resin, body pigment and curing agent. It can be widely used indoors and outdoors on various surfaces of light metal and cement structures.

The material is coated with a special high solid epoxy primer to improve adhesion. Its good anti-corrosion and water resistance makes it suitable for flooded areas. Good drying and curing properties make it particularly suitable for water conservancy construction materials.

 2.Polymer Anti-corrosion Top Coat

The top coat requires good corrosion resistance. Polymer anti-corrosion paint has good acid, alkali and salt corrosion resistance and excellent water, oil and weather resistance. It is widely used in environmental protection equipments, sewage treatment projects and other anti-corrosion engineering coating of underground or ground steel and concrete structures.

Our customer is engaged in water industry. We need to measure the thickness of both 2 layers of paint on the asbestos sheet.

Base Material:Fiberless cement asbestos sheet,formed by scraping method,with two layers coating.

First Layer:High Solid Epoxy Paint.

Second Layer:Polymer Anti-Corrosion Top Coat.

The quality and thickness of the primer and topcoat are very important to the performance of the asbestos sheet and relate to its longevity. An excessively thin coating is more likely to be damaged than an excessively thick one, because an excessively thin coating is prone to leakage and faster penetration of water and oxygen. For harsh usage environments, it is necessary to increase the thickness of the coating appropriately, but too thick a coating can sometimes lead to wrinkling. This results in poor adhesion of the coating to the substrate and easy peeling. To prevent wrinkling, the coating process should be standardized to control the thickness of each layer.

Portable ultrasonic thickness gauge adopts ultrasonic principle, easy and fast measurement. Coating thickness can be inspected at any time, and measurement results can be stored for analysis.

We use the YUSHI PM5 Gen2 Ultrasonic Thickness Gauge to visually and accurately determine echo conditions from real-time A-scan waveforms. Coupled with a 15-20M single-crystal delay line probe, the ultrasound enters the coating through couplant and reflects off surfaces of varying densities. Coating thickness readings are obtained by measuring the time it takes for the ultrasound to propagate from the probe to the coating-coating/coating-substrate interface and back again. The time is divided by 2 and multiplied by the speed of sound through the coating to give the coating thickness.

In order to mesaure and display the thickness of both 2 layers of paint simultaneously, we can add Double-Layer measurement mode to the PM5 Gen2. This measurement mode is one of the powerfull software options of PM5 Gen2 high-precision thickness gauge. Using double-layer measurement mode can adjust each layers' waveform and measure 2 layers thickness at the same time. Actually,there are 16 software options that can make PM5 Gen2 become a intelligent and versatile thickness tester for vairous industries.

Tested with YUSHI PM5 Gen2 Ultrasonic Thickness Gauge equipped with 15M delay line probe, the measured value is stable, the echo is clear and the result is accurate.

As a waterproof and anti-corrosive material, the protective layers of fiberless cement asbestos sheets, primer and topcoat, play an important role. If you would like to learn how to measure the thickness of multiple layers simultaneously using ultrasonic technology, or if you encounter any problems in your measurement application, please feel free to contact us and we will provide you with a solution.