Fig. 1-The parts on the left have clean, shiny, corrosion-resistant surfaces after proper passivating. The parts on the right exhibit "flash attack" after treatment in a contaminated passivating solution.
Fig. 3-The test cone on the left shows a bright finish with improved resistance of free-machining stainless steel when passivated using the A-A-A method. The result of conventional passivation is visible on the right. Both samples were exposed to salt spray.