NDT (Non Destructive Testing) is a form of non-destructive testing without compromising the integrity of a material. With this method, faults and defects are detected at invisible points or surface of the material to be checked. In addition, the amount of another material contained in this material can be measured by this method. Or paint thicknesses on metal surfaces can be determined. Briefly non-destructive testing methods With this method, information about the dynamic and static structures of the material is obtained without any damage to the material controlled.
Random nondestructive testing methods. Different non-destructive testing methods are applied according to the type of material to be checked and the type of error sought. Here are a few non-destructive testing checks:
- Eye examination
It is a fairly simple method. Factors affecting quality, such as structural defects on the surface of a product and the condition of the surface, are examined by means of a magnifying glass or only by direct visual inspection. In most application standards, it is recommended that visual inspection and recording of the findings be done first.
- Inspection by liquid impregnation
It is a method used for the detection of surface defects. This method is preferred for detecting surface defects of all metallic or non-metallic materials, provided they are not porous. A penetrant liquid is used in this method. The results are evaluated depending on the surface tension and density of the material being checked.
- Inspection by eddy currents
This method is suitable for detecting surface and near surface defects. This method can be used in all metals and alloys which have electrical conductivity. Inspection by eddy currents can measure cracks, corrosion, paint or coating thickness on a conductive material and conductivity measurement.
- Inspection with magnetic parts
This method is a very simple, fast and cost-effective method for detecting and locating surface and near defects. Detection of surface defects in this method depends on the size of the defect and its proximity to the surface. It can be applied to all magnetizing materials. The basis of the method is the magnetization of the controlled material.
- Ultrasonic examination
In this method, high-frequency sound waves produced by the inspection tool are used to detect defects in the material to be checked. Flood waves propagate through the controlled material and reflect when a fault or defect hits.
- Radiographic examination
This method is a very sensitive examination method. As inspection results can be recorded permanently, it is one of the most widely used non-destructive testing methods in the industry. The material to be controlled is irradiated with X or gamma rays. As these rays pass through the material, some amount is swallowed depending on the properties of the material. The rays then reach a film placed on the back surface of the material. After the film has been bathed, the blacking on the film indicates the location of the defects and defects.
TÜRCERT certification body, as well as conformity assessment and certification studies, testing and inspection services also provides. If there is a need to get more information about various non-destructive testing checks or to have these inspections done, the TÜRCERT certification institution is ready to meet the needs of the enterprises with its experienced managers and employees.