Denso Corporation

Other

Nippon Paint Compnay, Ltd.

Nihon Parkerizing Co., Ltd.

Osamu Kasebe

Kengo Kobayashi

Hiroyoshi Sugawara

Kazuhisa Uchiyama

Kazunari Hamamura

Toshio Inbe

Norizumi Matsui

Yoshimitsu Inoue

Takayuki Hirose

Yoshiyuki Okamoto

Koichi Saito

Hiroki Nakamura

Hiroshi Nonoyama

Yuji Takeo

Mitsuyo Oomura

Toshinobu Homan

Kenji Nakamura

Akira Ushio

Eiji Takahashi

Susumu Maekawa

Hitoshi Kuno

Hiroaki Fukuda

Yasushi Furukawa

Shin Nishiya

Tomomi Takagi

Kenji Karube

Kensuke Shimoda

Hirokatsu Bannai

Provided is an aluminum or aluminum alloy material having a surface treatment coating film on a surface of a substrate formed by an aluminum or aluminum alloy. The aluminum or aluminum alloy material has: a substrate formed by an aluminum or aluminum alloy; and a first protective layer and a second protective layer in the order on a surface of the substrate, wherein the first protective layer is a conversion coating film including vanadium and at least one or more types of metals selected from titanium, zirconium, and hafnium, the second protective layer is an organic coating film having a composition that includes (1) a chitosan derivative and a solubilizing agent, (2) a modified polyvinyl alcohol formed by graft polymerization of a hydrophilic polymer to a side chain of polyvinyl alcohol, and (3) a water-soluble crosslinking agent.

Aluminum or aluminum alloy material having surface treatment coating film, and method for treating a surface thereof

There is disclosed a rust prevention and hydrophilization treatment method for a flux-brazed aluminum-made heat exchanger which comprises subjecting the same to a rust prevention treatment by the use of a zirconium base compound and/or a titanium base compound, and thereafter subjecting the same to a hydrophilization treatment by means of a hydrophilization treatment agent composition containing the under-mentioned components: The above simplified method dispenses with a flux removal step without causing wastewater treatment problems, and thus assures favorable rust prevention and deodorization effects.

Surface treatment method for flux-brazed aluminum-made heat exchanger

A method of surface treating an aluminum alloy base body of an heat exchanger which method enables an etching procedure to be carried out uniformly and quickly and a corrosion-resistant chemical conversion coating to be formed, is effected by pretreating the Al heat exchanger base body with an aqueous pre-treating liquid having a pH of 9.0 or less, etching the pretreated base body with an aqueous alkaline solution having a pH of 9.0 or more, and then subjecting the etched base body to a chemical conversion treatment or a hydrophilicity-enhancing treatment.

Method of surface treating aluminum alloy base body of heat exchanger and heat exchanger produced by the method

In a heat exchanger having tubes and fins, a polyaniline film made of polyaniline and/or a derivative thereof is formed on the surfaces of the tubes and the fins. This polyaniline film is imparted with at least one hydrophilic functional group selected from the class consisting of a primary amino group, a secondary amino group, a tertiary amino group, an ammonium group, a nitric acid group, a carboxyl group, a sulfonic acid group, a phosphonic acid group and a hydroxyl group. Accordingly, the surfaces of the tubes and the fins has good water wettability while maintaining deodorizing and sterilizing functions.

Base material having thereon polyaniline-containing film surface, and process for forming film surface on base material

An aluminum alloy heat exchanger having excellent hydrophilicity and resistance to absorption or impregnation of tobacco odorous components has an organic hydrophilic coating layer formed on at least a portion of a base body of the heat exchanger and containing (A) at least one chitosan compound, (B) at least one two or more carboxyl group-containing organic compound and (C) at least one hydrophilic polymeric substance different from the components (A) and (B), in which the total solid content of components (A) and (B) is 20 mass % or more and the solid content of component (C) is 0.1 to 10 mass %.

Aluminum alloy heat exchanger resistive to tobacco odor impregnation

An aluminum alloy heat exchanger resistive to impregnation of tobacco odor includes a base body of an aluminum alloy heat exchanger and an organic hydrophilic coating layer formed on the surface of the heat exchanger base body, and including a component (A) containing a chitosan compound selected from chitosan and derivatives thereof, and a component (B) containing a carboxylic compound having two or more carboxyl groups per molecule thereof, in a total solid amount of the components (A) and (B) of 20% by mass or more, based on the total amount by mass of the organic hydrophilic coating layer.

Hydrophilic modification method and heat exchanger treated thereby

When an after-evaporation temperature TE remains below the wet-bulb temperature Twet, the compressor is intermittently operated for a predetermined time after the elapse of a first time To from compressor stopping. On the other hand, when the after-evaporation temperature TE is higher than the wet-bulb temperature Twet, the intermittent operation mode stops. This reduces dispersion of offensive smells from the evaporator.

Air-conditioning system for vehicles

Growing community of inventors

Kariya, Japan

Osamu Kasebe