• Promtech Group

Chemicals For Non-Destructive Testing

Liquid red dye penetrant chemicals are extensively used as one the most reliable and fairly economical methods of non-destructive testing for detection of very minute surface cracks, pinholes, deformities in all types of structural and welded steels, boiler tubes, condenser tubes and turbine and power generation equipment. This method of testing is used on sight, as well as on the shop-floor and is independent of shapes/curves of the substrate. These chemicals are formulated so as to penetrate in the minutest of the cracks/pinholes, by an excellent capillary action and shall have the sensitivity to detect all the cracks/defects completely. Red colour of the penetrant, which is adsorbed in the cracks/pinholes, is then blotted by the spray of the developer, thereby giving a high degree of contrast against white developer background and the colour is very easily distinguishable. A very small residual amount of sulphur or chlorine even at ppm levels is highly objectionable on surface. This is especially applic