Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...
Patent
1998-02-05
2000-11-07
Jones, Deborah
Stock material or miscellaneous articles
All metal or with adjacent metals
Composite; i.e., plural, adjacent, spatially distinct metal...
428659, 428632, 428626, 428223, 428935, B32B 1500
Patent
active
061434221
ABSTRACT:
A material which can be improved in its resistance to corrosion caused by alcohol-containing fuels after formation without detriment to weldability and without any substantial cost increase is developed.
Constitution
A chromate film is applied to a Zn--X alloy electroplating layer, in which X is one or more of Ni: 3-18 wt %, Co: 0.02-3 wt %, Mn: 25-45 wt %, or Cr: 8-20 wt %. The Zn--Ni alloy plating layer underlying the chromate film has cracks with a density of 1000-150000 in terms of the number of plated regions surrounded by cracks in a 1 mm.times.1 mm visual field, with cracks having a maximum width of 0.5 .mu.m or less comprising 90% or more of the total number of the cracks, and with cracks having a depth of 80% or more of the thickness of the plating layer comprising 80% or more of the total number of the cracks.
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patent: 5932359 (1999-08-01), Nagai et al.
"Corrosion Mechanism of Zn-Ni Alloy Plating", H. Tsuji et al., (Oct. 10, 1982), The 66.sup.th Scientific Lecture Summaries by Metal Surface Technology Association, Japan, p. 144-145.
Kajiyama Eiji
Kashiwagi Hiroyuki
Kawanishi Yoshihiro
Nagai Hiroyuki
Tsuchiya Shinichi
Jones Deborah
Resnick Jason
Sumitomo Metal Industries Ltd.
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