SURFACE-TREATED STAINLESS-STEEL SHEET WITH EXCELLENT CORROSION RESISTANCE IN SALT DAMAGE ENVIRONMENT FOR AUTOMOTIVE FUEL TANK

Title:

SURFACE-TREATED STAINLESS-STEEL SHEET WITH EXCELLENT CORROSION RESISTANCE IN SALT DAMAGE ENVIRONMENT FOR AUTOMOTIVE FUEL TANK

Document Type and Number:

WIPO Patent Application WO/2007/083580

Kind Code:

A1

Abstract:

A surface-treated stainless-steel sheet with excellent corrosion resistance in a salt damage environment for automotive fuel tanks, characterized by comprising: a ferritic stainless-steel sheet base containing 10.0-25.0 mass% chromium and having an average r value of 1.4 or higher and an overall elongation of 30% or higher or an austenitic stainless-steel sheet base containing 10.0-25.0 mass% chromium and having an overall elongation of 45% or higher and a degree of work hardening of 400 N/mm2 or lower; and a deposit layer formed over a surface of the base in an amount of 5-80 g/m2, the deposit layer containing 5-13 mass% silicon, with the remainder being unavoidable impurities and aluminum. It is further characterized in that the alloy layer formed between the deposit layer and the base iron has a thickness smaller than 5.0 µm, and that it has, formed on the deposit layer, a lubricant coating film which comprises a soluble resin and a lubricity-imparting agent, the amount of the agent being 1-30 mass% based on the soluble resin, and has a coefficient of friction of 0.15 or lower.

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Inventors:

SAKAMOTO SHUNJI (JP)
TANOUE TOSHIO (JP)
ONO NAOTO (JP)
KANAI TAKAO (JP)

Application Number:

PCT/JP2007/050362

Publication Date:

July 26, 2007

Filing Date:

January 05, 2007

Export Citation:

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Assignee:

NIPPON STEEL & SUMIKIN SST (JP)
SAKAMOTO SHUNJI (JP)
TANOUE TOSHIO (JP)
ONO NAOTO (JP)
KANAI TAKAO (JP)

International Classes:

C23C28/00; C22C38/00; C23C2/12; B32B15/08; B60K15/03; C10M101/02; C10M105/24; C10M107/02; C10M107/38; C10M149/14; C10M151/04; C10M169/04; C10N30/00; C10N30/06; C10N30/12; C10N40/24; C10N50/02; C22C38/50

Foreign References:

JP2003221660A	2003-08-08
JP2002327257A	2002-11-15

Attorney, Agent or Firm:

AOKI, Atsushi et al. (Toranomon 37 Mori Bldg. 5-1, Toranomon 3-chom, Minato-ku Tokyo 23, JP)

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