Comparison of properties with various types of coated steel sheets
Corrosion resistance on flat parts
ZAM has better resistance to red rust than galvanized and hot-dip zinc-5% aluminum alloy coated steel sheets
Results of salt spray test (SST: JIS Z 2371) Appearances of specimens after salt spray test
(Coating weight: 90/90 g/m2, untreated)
Corrosion resistance on cut edge
ZAM® shows better red-rust resistance (durability) on cut edge than any other coated steel sheet.
Appearances of cut edges after salt spray test
(Thickness: 3.2 mm, coating weight: 120/120 g/m2, untreated)
Change in the appearance of cut edge during outdoor exposure test
The cut edge of ZAM® will be covered with a protective film and change to a subdued color as time passes.
Appearances of cut edge sections after outdoor exposure test (testing location: seaside industrial area in Sakai)
(Thickness: 2.3 mm, coating weight: 90/90 g/m2, chromate treatment: 50 mg/m2)
Corrosion resistance of bent sections
Appearances of 1t bent section after salt spray test
(1t, 180º bending, thickness: 3.2 mm, 120/120 g/m2, untreated)
Change in appearance at bent section during outdoor exposure test
Corrosion resistance of drawn sections
ZAM® shows better corrosion resistance on drawn parts compared to hot-dip zinc-5% aluminum alloy coated steel sheets.
Appearances of drawn parts after salt spray test
(drawing height: 25 mm, thickness: 0.8 mm, coating weight: 70/70 g/m2, untreated)
Source: Nippon Steel
