Magnetic particle testing is a process for identifying defects in ferromagnetic material. It is mostly used for detecting internal flaws in ferromagnetic materials like pipes, wind turbine blades, and even aircraft.
Certain defects are difficult to spot without this type of testing and so it has become an important part of quality assurance.
In this blog, we will be looking at the various aspects of the magnetic particle inspection process and what you can expect from magnetic particle testing training.
Processes of Magnetic Particle Testing
Magnetic particle testing is used in most industries like aerospace, automotive, electronics, textiles, military, and even food industries. The process is based on the magnetic properties of iron particles contained in a liquid suspension that is applied to the test material. These magnetic properties are used to find out the cracks, defects, and discontinuities in the surface of the tested object.
The liquid is then dried and the particles are magnetized. The test material will be passed through a magnetic field. If there are any indications of cracks or surface or subsurface flaws, the magnetic particles will flow into the crack, filling it as much as possible.
Most times the amount of flow is measured and used to determine the presence, size, and depth of the crack. However, the process is essential in the aerospace and electronic industries, where the quality of the product is essential.
A good NDT process is 100% reliable, efficient, and cost-effective. With the growing number of industries that use NDT to inspect their products, there has been an increase in the need for NDT equipment. The NDT process is made up of two parts – the inspection and the evaluation. The two parts rely on the right equipment to give accurate, reliable, and precise results.
What is the Principle of MPT?
The principle of MPT is based on the detection of magnetic particles (particles are tiny magnetic bodies that are attracted to a magnet). To ensure the reliable detection of defects, the magnetic particles must have a diameter of 1-2µm.
In addition, the magnetic particles should have a high saturation magnetization and their saturation should be stable under the influence of external magnetic fields. They must also have low coercivity, i.e. the magnetic particles should be easily saturated and have a low coercivity under the influence of external magnetic fields.
The magnetic particles must comprise only one magnetically active element (Fe, Co, Ni) to avoid interactions between the particles. The magnetic particles can be of natural or synthetic origin.
The test method is extremely sensitive, particularly to discontinuities in the surface of the test part. The sensitivity of MPT is enhanced by using specially designed probes.
3 Things to Learn from MPT Training Course
Many people engage in non-destructive testing certification courses to obtain a complete understanding of the foundations of magnetic particle testing. These programs are made to give information on how to use calibrated MT equipment properly and how to analyze test specimen findings. Here are 3 things you can learn from the magnetic particle testing training course:
#1. Recognizing False Indicators
All indicators in the field of magnetic particle testing are broken down into four fundamental groups:
- False
- Irrelevant
- Discontinuities
- Flaws
NDT specialists need in-depth knowledge of misleading and irrelevant signs to complete testing operations. These two indications can postpone the adoption of corrective measures due to their extremely unexpected nature.
You can gain a good understanding of the key distinctions between various sorts of indicators by enrolling in an accredited magnetic particle training program. Having this knowledge will be very beneficial for preventing miscommunications while working on a project.
#2. Practical Instruction for Magnetic Particle Inspections
Theoretical understanding of the fundamental concepts behind magnetic testing processes is insufficient to manage real-world situations. For efficient testing, you require practical experience in this field and suitable training. The knowledge gained through magnetic particle testing training programs will enable workers to handle real-world situations more effectively.
#3. Industry Norms and Codes
You must be completely familiar with the rules and regulations governing the industry to specialize in the subject of magnetic particle testing. By doing this, you’ll be able to apply preventative maintenance practices while also removing any problems with the process’ application and completion.
When you register for magnetic particle training to be certified you can get in-depth details about process specifications and standards.
Conclusion
To sum it up, the MPT method is a very accurate and cost-effective way to test for flaws in metal components. It is used when it is necessary to determine whether or not a part or material has flaws or imperfections in it.