Method for surface inclusions detection in nitinol which are primary corrosion and fatigue initiation sites and indicators of overall quality of nitinol material
The method for surface inclusions detection in wrought and finished Nitinol products by immersing them in aqueous solution of 1% to 12%, and preferably 6%, sodium hypochlorite at room temperature of around 25° C. for specific period of time, preferably 15 minutes while checking for black flocculent precipitate developing on the surface indicating the presence of an inclusion. The presence of black flocculent precipitate indicates surface inclusions and lack of homogeneousness of material.
