What is the ideal temperature range for performing liquid penetrant testing?

The ideal temperature range for performing liquid penetrant testing is typically between 15°C and 40°C. This range is conducive to ensuring that the penetrant materials properly adhere to the surface and effectively penetrate the discontinuities without the risk of being adversely affected by environmental conditions. At temperatures below 15°C, the viscosity of the penetrant can increase, making it less effective, while above 40°C, the materials may evaporate more quickly or dry out, potentially compromising the testing process. Therefore, this specific temperature range allows for optimal application, dwell time, and overall performance of the liquid penetrant testing method.