JPH05137478A - Fishing hook - Google Patents

Abstract

PURPOSE:To provide a fishing hook excellent in the strength, coating film adhesiveness and abrasion resistance by forming a titanium compound coating film on the surface of a substrate through a silicon oxide coating film. CONSTITUTION:A titanium compound coating film 3 (preferably 3-5mum thick) is formed on the surface of a substrate 1 through a silicon oxide coating film 2 (preferably 1-2mum thick) to provide the objective fishing hook.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrosion-resistant coating method for fishing hooks.

[0002]

2. Description of the Related Art As a conventional method for preventing corrosion of fishing hooks, a single coating such as corrosion-resistant metal plating is mainly used.

[0003]

The conventional fishing hook has a single anticorrosion property and is not perfect, and there is a problem that rust occurs when used in water.

The present invention aims to provide a method for more complete prevention of rust, especially in seawater.

[0005]

In order to achieve the above object, a fishing hook having a titanium oxide film (3) formed on the surface of a base (1) with a silicon oxide film (2) interposed therebetween. In the present invention relating to, as shown in FIGS. 1 and 2, a compound (2) (silicon oxide film) that is not ionized by water is deposited on the underlayer (1) by a CVD method or a PVD method for 1 to 2 microns, A titanium compound film (3) which is strong in chlorine and has a high hardness (HV2000-3000) is deposited by the same method as in the case of 3-5 μm. Further, the titanium compound film may be formed in a plurality of layers, and the titanium carbide film, the titanium carbonitride, and the titanium nitride film may be respectively formed by the same method of 1 to 2 microns.

[0006]

Function: Corrosion of iron inside can be prevented by the property that the silicon oxide film is not ionized even if seawater or the like enters from the outside through the pinhole of the surface layer.

[0007]

EXAMPLE A commercially available fishing hook is first degreased and washed with a solvent, and then a silicon oxide film is deposited by a CVD method at 0.1 torr and 700 to 800 ° C. for 1 to 2 μm. As a titanium compound film at a pressure of 800 to 1000 ° C., a titanium carbide film, a titanium carbonitride film, and a titanium nitride film were sequentially deposited in the order of 1 to 2 μm.

[0008]

EFFECTS OF THE INVENTION The fishing hook according to the present invention is excellent in strength, film adhesion and corrosion resistance. For example, even when immersed in a 3% sodium chloride solution for 96 hours, the amount of iron dissolved is reduced by half compared to the conventional product.

[Brief description of drawings]

FIG. 1 is a perspective view (front view) of a fishing hook according to the present invention.

FIG. 2 is a sectional view taken along line AB.

[Explanation of symbols]

 1 Fishhook base 2 Silicon oxide film 3 Titanium compound film

Claims (1)

[Claims] 1. A fishing hook in which a titanium oxide film (3) is formed on the surface of a substrate (1) with a silicon oxide film (2) interposed therebetween.