Nippon Paint Compnay, Ltd.

Showa Aluminum Corporation

Kiyotada Yasuhara

Atsuhiko Tounaka

Yasuhiro Shibata

Masahiro Kojima

Tomoyuki Kanda

Fujio Mikami

Shigeyuki Meguro

Susumu Maekawa

Toshiaki Shimakura

Katsuyoshi Yamasoe

Hiroyuki Nojiri

Kageki Fujimoto

Futoshi Watanabe

Susumu Inoue

Tsutomu Motohashi

A metal surface treatment composition is provided which improves corrosion resistance and film adhesion, and confers slip properties. This composition is an acrylic resin-containing metal surface treatment composition which is water-soluble, water-dispersible or emulsifiable, which comprises an acrylic resin, this resin comprising either or both of an amino group and an ammonium group together with a hydroxyl group and a hydrophobic group, and which further comprises a heavy metal or one of its salts.

Acrylic metal surface treatment composition with hydroxy and amino/ammonium functionality

Metal surface treatment composition containing an acrylic resin

Flux composition for brazing of aluminum material and method for brazing

A surface-treated metal material wherein a film comprising an organic polymer compound having 5-100 mg of carbon per m.sup.2 and a phosphoric acid compound having 1-30 mg of phosphorus per m.sup.2 is formed on a metal surface, the ratio C/P of carbon atoms C to phosphorus atoms P in the film lying within the range 2-25.

Surface-treated metal material and metal surface treatment method

In a continuous surface treating method and apparatus with an inline centrifugal separator, an object to be treated is contained in a basket and hung from a hanger of an overhead type and a series of surface treatments of the object is carried out by using a continuous conveyer of a power and free type. By using a hanger attach-detach conveyer, the object is moved from a main conveyer to a sub-conveyer and an excessive treating liquid attached to the object in a previous process is separated by using the centrifugal separator. Then, the object is returned from the sub-conveyer to the main conveyer to perform a next process. The surface treating apparatus includes the rotatable basket for containing the object. When the surface treatment of the object such as a heat exchanger or the like is continuously executed in the conveyer line, a bringing of the excessive treating liquid attached to the object in the previous process into a next process can be prevented and the concentration of the treating liquid in a bath can be maintained to a constant value. As a result, the obtained film thickness becomes uniform and the quality of the object can be improved.

Continuous surface treating method and apparatus with inline centrifugal

The hydrophilic coating composition including, on a solid basis, (a) 0.3-6 parts by weight of polyvinyl pyrrolidone having a polymerization degree of 10-1000; and (b) 1-10 parts by weight of polyvinyl alcohol having a saponification degree of 80% or more and a polymerization degree of 100-1000, a weight ratio of the component (a) to the component (b), (a)/[(a)+(b)], being in the range of 0.1-0.9.

Hydrophilic coating composition and bath containing same

A cleaning agent is used to wash surfaces of aluminum products in a cleaning bath. The cleaning agent is a water-soluble acid containing ferric ions. During the cleaning process, the ferric ions are reduced to ferrous ions. The used cleaning agent is sent to an electrolytic tank so that the ferrous ions are subject to the electrolytic oxidation to be converted into ferric ions. The regenerated cleaning agent is returned to the cleaning bath.

Method of regenerating aluminum surface cleaning agent

A hydrophilic surface treatment chemicals comprising, on a solid basis,

Hydrophilic surface treatment chemicals, hydrophilic surface treatment

Growing community of inventors

Kashiwa, Japan

Kiyotada Yasuhara