Sumitomo Light Metal Industries, Ltd.

Fuji Photo Film Company, Limited

Nippondenso Co., Ltd.

Zenichi Tanabe

Toshiyasu Fukui

Hiroshi Ikeda

Hirokazu Sakaki

Azusa Ohashi

Yoshio Baba

Shin Tsuchida

Yoshikatsu Hayashi

Satoshi Kimura

Teruo Uno

Akira Shirai

Haruo Nakanishi

Shiro Terai

Tatsuo Miura

Katsuhisa Itoh

Yoshiaki Watanabe

Taketoshi Sugiura

An aluminum alloy, a lithographic printing plate support, a lithographic printing plate using the aluminum alloy are disclosed. The aluminum alloy is comprised of aluminum containing 0.20 to 1.0% Fe and 0.005 to 0.1% of elements selected from the group consisting of Sn, In, Ga and Zn. The support composed by the aluminum alloy can be chemically etched with an acid and/or an alkali solution and after undergoing etching the surface of the support is uniformly etched. The uniformly etched surface may be provided with a subbing layer or an anode oxidation film. The support is coated with a light-sensitive layer and utilized as a lithographic printing plate.

Aluminum alloy, a support of lithographic printing plate and a

A clad material for use in heat exchangers comprises a core metal layer made of an aluminum base alloy containing Mg, and a cladding metal layer made of an aluminum base alloy containing Sn and Mg. The core metal layer can contain at least one metal selected from the group consisting of Mn, Si, Cr, Cu and Zr, and a cladding metal layer can also contain at least one metal selected from the group consisting of Zn, Ti, In and Ga.

Aluminum base alloy clad material for use in heat exchangers

A lithographic printing plate support and a process for producing it are disclosed. The plate is produced by providing an aluminum alloy material which is comprised of 0.20 to 1.0% Fe, 0.005 to 0.1% of an element selected from the group consisting of Sn, In, Ga and Zn and the remainder being aluminum. The alloy may further contain 0.1 to 2% Cu. After providing the aluminum material either or both of its surfaces are subjected to a chemical etching treatment in order to provide a uniform and dense grain structure on the surface forming primary pits in the surface having a particularly defined average size. The surface is then subjected to electrochemical etching treatment in an acidic electrolytic solution in order to provide secondary pits on the surface also having a particularly defined average size. The support base may be further treated to provide in additional coating thereon or directly coated with a light-sensitive layer in order to provide a light-sensitive lithographic printing plate. By providing the particular alloy material and subjecting it to the disclosed treatment the light-sensitive layer has good adhesion with respect to the support.

Support for lithographic printing plate and lithographic printing plate

A method of producing high purity aluminum-lithium mother alloys essentially free from other alkali metals than lithium, which comprises electrolyzing a mixed molten salts consisting of 34 to 64 wt. % of lithium chloride and 66 to 36 wt. % of potassium chloride, and, optionally, 1 to 20 wt. % of sodium chloride based on a combined weight of the aforesaid two components, using solid aluminum as cathodes, and an .alpha.+.beta. phase aluminum lithium alloy electrode or the alloy coated electrode as a reference electrode, under a current density in the range of 0.005 to 1 A/cm.sup.2, whereby producing aluminum-lithium alloys on the cathode. During electrolyzing, the potential difference between the cathode and the reference electrode is continuously measured and differentiated with respect to time and at the point of a sudden change in the differentiated value, electrolyzing is stopped.

Electrolytic method of producing a high purity aluminum-lithium mother

A sacrificial brazing fin stock for use in an aluminum base alloy heat exchanger comprises an aluminum base alloy core having a grain size of 100 .mu.m or more and consisting essentially of 0.5 to 2 wt. % manganese plus iron, said manganese being more than iron, 0.1 to 0.7 wt. % zinc, 0.001 to less than 0.02 wt. % tin, and balance aluminum and a cladding consisting of one material selected from an Al-Si base alloy and an Al-Si-Mg base alloy. The above fin stock protected a main tube of the heat exchanger from a pitting corrosion and led to a greatly expanded use of the aluminum base alloy heat exchanger.

Brazing fin stock for use in aluminum base alloy heat exchanger

The heat exchanger core comprises a fluid passage member within which a fluid flows and outside of which another fluid flows, and fin members formed on the fluid passage member for promoting heat exchange between the two fluids, and the fluid passage member and the fin members are made of different kinds of aluminum alloys, and the fin members serve as sacrificial anodes as well as for protecting the heat exchanger core from corrosion.

Heat exchanger core

The fin stocks for use in a heat exchanger made of aluminum alloy are made by use of an aluminum alloy having a sacrificial anode effect so that the fluid passage members of the heat exchanger are protected from corrosion electrochemically. A method for producing an aluminum alloy for use in the fin stocks is disclosed with the analysis of the function of each component of the aluminum alloy and determination of the ratio of each component in the alloy.

Fin stocks for use in heat exchanger made of aluminum alloy and

The heat exchanger core comprises a fluid passage member, within which a fluid flows and outside of which another fluid flows and fin members formed on the fluid passage member for promoting heat exchange between the two fluids. The fluid passage member and the fin members are made of different kinds of aluminum alloys. The fin members serve as sacrificial anodes as well for protecting the heat exchanger core from corrosion.

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Nagoya, Japan

Zenichi Tanabe