Kabushiki Kaisha Kobe Seiko Sho

Kobe Steel, Ltd.

Doryokuro Kakunenryo Kaihatsu Jigyodan

Hiroshi Satoh

Kazutoshi Shimogori

Hidetoshi Nishimoto

Yasuaki Sugizaki

Tatsuya Yasunaga

Koki Ikeda

Toshio Fukuzuka

Masao Toyama

Keiji Ueda

Takashi Yashiki

Hirohiko Sakai

Shingo Nomura

Fumio Kamikubo

Junji Kawahuku

Shoji Miyake

Takenori Nakayama

Katsuyuki Ohtsuka

Yasunori Wada

Tatsuo Hara

Yoshinori Terada

Hitoshi Miyazaki

Ryukichi Mizuno

Junji Kawafuku

Kenji Umei

Fumio Kami Kubo

Hidetoshi Shimoto

A machine part comprises: a base part formed of a titanium alloy or an aluminum alloy and having a roughened surface of Ra 0.5 .mu.m or above and PPI.sub.50 or above; and a Ni--P electrodeposit layer formed over the surface of the base part by an electroplating process using a Ni--P plating bath containing a stress relaxing agent, and having a stress of 20 kgf/mm.sup.2 or below. The machine part has a small specific gravity, excellent seizure resistance, wear resistance and fatigue strength.

Machine part resistant to rolling friction

A corrosion resistant Ti based alloy comprising:

Corrosion resistant Ti alloy containing Cu, Si, and a platinum group

Corrosion resistant Ti-Cr-Ni alloy containing a platinum group metal

Zn-Mg alloy is plated by vapor deposition on the surface of metals. Since Zn and Mg are vapor-deposited as a vapor mixture of an optional ratio on the surface of metals, plated layers of excellent corrosion resistance, peeling resistance of coating film, formability, etc. can be formed. There is disclosed a method of forming uniform vapor mixtures of Zn and Mg, and vapor-depositing them on the surface of metals as the method forming the vapor-deposited layers.

Zn-Mg alloy vapor deposition plated metals of high corrosion resistance,

Provided herein is an Al-Cr alloy vapor deposited product having high corrosion resistance which can be used under a corrosive environment for a long period of time on account of the outstanding corrosion resistance and heat resistance of the Al-Cr alloy vapor deposited layer.

Al-Cr alloy vapor-deposited material

There is provided a Ti-Mo alloy containing 0.2 to 3.0 wt % of molybdenum, with the balance being substantially titanium, characterized in that the amount of Fe in the impurities is not greater than 0.1% and the amount of O.sub.2 in the impurities is in the range that satisfies the following equation on the basis of the amount of Mo (%).

Titanium molybdenum alloy superior in resistance to pitting corrosion in

A method of minimizing corrosion deterioration and hydrogen absorption embrittlement of tantalum encountered in performing acid digestion of organic waste matter put in an acid digestion kettle of tantalum containing high temperature high concentration sulfuric acid includes the addition of nitric acid, nitrous acid, nitrates, nitrites and/or nitrogen oxides to the sulfuric acid bath.

Method of stabilized operation of acid digestion kettle of tantalum

A sacrificial anode for use in preventing corrosion of copper alloy parts and hydrogen absorption in titanium or titanium alloy parts of an apparatus useful for treating hot sea water, comprising a metal or metal alloy which maintains the potential of said copper alloy parts and titanium or titanium alloy parts serving as cathodes in said apparatus in the range of -0.5 to -0.65 V, relative to the potential of a saturated calomel electrode.

Sacrificial anode and apparatus employing same for treating hot sea water

An electrolytic cell for use in various electrolytic treatments such as the sterilization of sea water includes a plurality of monopolar bar type electrodes, and an electrolytic solution filled in clearances between the electrodes. At least one group of electrodes disposed in the electrolytic cell is arranged so that one electrode is located at the center of an equilateral hexagon and the other electrodes are located at apexes of the hexagon.

Electrolytic cell with electrodes arranged as a hexagon

Growing community of inventors

Kobe, Japan

Hiroshi Satoh