How does ambient temperature affect the magnetic particle spray?

Higher temperatures can reduce the viscosity of the magnetic particle suspension, which is crucial for effective magnetic particle inspection. In this method, a liquid medium that contains magnetic particles is applied to the surface of the material being inspected. The viscosity of this suspension determines how easily the particles can move and spread across the surface. When the temperature rises, the liquid tends to become less viscous, allowing the magnetic particles to flow more smoothly and to more effectively coat the areas where potential defects might be present. This improved flow can enhance the visibility of any indications created by the particles accumulating around flaws, leading to more accurate inspections.

On the contrary, cooler temperatures can increase the viscosity, leading to a thicker suspension that may not spread as effectively, thus potentially missing critical defects. Understanding the impact of temperature on viscosity is essential for ensuring that the inspection process yields reliable results.