Mitsui Minings & Melting Co., Ltd.

Mitsuo Suzuki

Makoto Dobashi

Hisao Sakai

Susumu Takahashi

Yasuji Hara

Tsutomu Asai

Toshiko Yokota

Tsutomu Higuchi

A corrosion-resistant article of a magnesium material having the gloss of the metal substrate surface comprises an anodic oxide film formed on the external surface of an article of magnesium or a magnesium alloy, which never changes the gloss of the metal substrate and a colorless or colored transparent electrodeposition coating film on the anodic film. Such an article can be prepared by immersing an article of magnesium or a magnesium alloy in an electrolyte containing a phosphate and an aluminate to thus form an anodic oxide film through anodization of the surface of the article and forming a colorless or colored transparent electrodeposition coating film on the anodic film through electrodeposition coating.

Corrosion resistant, magnesium-based product exhibiting luster of base metal and method for producing the same

A high tensile strength copper foil having a matte side roughness Rz of 2.5 &mgr;m or less and a tensile strength of 40,000 Kgf/mm,after heating one hour at 180&deg; C. is produced by a process in which copper is electrodeposited from a solution containing predetermined small amounts of a polyether glycol and tin and iron ions. The chloride ion content is maintained below 0.1 wt. ppm. The copper foil is characterized by having copper crystals with atomic cells having a predominently (111) orientation.

High tensile strength electrodeposited copper foil

A high tensile strength copper foil having a matte side roughness Rz of 2.5 .mu.m or less and a tensile strength of 40,000 Kgf/mm.sup.2 after heating one hour at 180.degree. C. is produced by a process in which copper is electrodeposited from a solution containing predetermined small amounts of a polyether glycol and tin and iron ions. The chloride ion content is maintained below 0.1 wt. ppm. The copper foil is characterized by having copper crystals with atomic cells having a predominantly (111) orientation.

High tensile strength electrodeposited copper foil and process of

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Saitama, Japan

Mitsuo Suzuki