ISO 17628 is a standard for magnaflux examination ?

No, ISO 17628 is not specifically a standard for Magnaflux examination. ISO 17628 is actually a standard related to non-destructive testing, specifically focusing on the use of liquid penetrant testing. Magnaflux is a brand that provides magnetic particle testing solutions, which is a different non-destructive testing method. Liquid penetrant testing (which ISO 17628 covers) involves applying a liquid dye or fluorescent penetrant to the surface of a material to detect surface-breaking defects. In contrast, magnetic particle testing (the method associated with Magnaflux) uses magnetic fields and iron particles to detect surface and near-surface defects in ferromagnetic materials. If you are looking for standards related to magnetic particle testing, you might want to look for standards such as ASTM E709 or ISO 9934.