| “ECO FRONTIER Z1” is a chromate-free black-colored steel sheet which offers a combination of an excellent heat absorption/radiation property and EMI shielding performance in addition to an attractive black appearance and high corrosion resistance, and has earned a high evaluation as one of JFE Steel's high performance products. This steel sheet comprises a black-colored layer formed on the surface of a Zn-Ni electro-plated steel sheet, and a chromate-free organic-inorganic composite film, which gives the product both excellent corrosion resistance and high heat absorption/radiation. Because “ECO FRONTIER Z1” also possesses good conductivity, spot welding can be applied. The new sheet is used in home electrical appliances, OA equipment, car audios, and other products which require groundability and EMI shielding performance.
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