Surface-treated stainless-steel sheet with excellent corrosion resistance in salt damage environment for automotive fuel tank

A technology of surface treatment and corrosion resistance, applied in the field of surface treatment of stainless steel plates and fuel tanks, it can solve the problems of stress corrosion cracking, not necessarily anti-corrosion effect, and alloy layer cracks.
CN101213323AInactive Publication Date: 2008-07-02NIPPON STEEL & SUMIKIN STAINLESS STEEL CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NIPPON STEEL & SUMIKIN STAINLESS STEEL CORP
Publication Date
2008-07-02
Estimated Expiration
Not applicable · inactive patent

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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 / mm<2> or lower; and a deposit layer formed over a surface of the base in an amount of 5-80 g / m<2>, 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 [mu]m, 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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Description

technical field

[0001] The present invention relates to a surface-treated stainless steel sheet for automobile fuel tanks and a fuel tank excellent in corrosion resistance in a salt damage environment. Background technique

[0002] In recent years, fuel system components such as fuel tanks and fuel lines are required to have properties such as fuel permeability prevention and long life due to the need for environmental protection and life-cycle cost reduction.

[0003] In fuel tanks or fuel pipes for automobiles, according to the laws of the United States, it is obliged to guarantee the long-term life of 15 years or 150,000 miles of driving. For the three substrates of ordinary steel, resin, and stainless steel, people are developing Fuel train components that meet these requirements.

[0004] Among the three substrates of plated steel, resin, and stainless steel, resin has a problem of recyclability; for plated steel, there is some concern about the durability of biofuels ...

Claims

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