A new passivation treatment method of 55%Al-Zn coated steel sheets (galvalume steel sheets) was developed that applies an organic-inorganic hybrid coating named "Super Genius Coat". Newly developed inhibitors introduced into this passivation treatment significantly enhanced corrosion resistance at formed areas, which has been a challenge for passivation treatments of 55%Al-Zn coated steel sheets. In addition, high formability was achieved by applying new organic resin.

super genius, galvalume steel sheet, Al, Zn, SG, coated steel sheet, passivation treatment, corrosion resistance