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Surface treatment method of carbon steel screw applied to preserving timber and structure, baking varnish coating formula

A surface treatment and screw technology, applied in the field of carbon steel screw surface treatment method and structure, can solve the problems that the influence of hexavalent chromium film cannot be ignored, and the corrosion resistance of anti-corrosion wood cannot be satisfactory.

Inactive Publication Date: 2006-12-13
苏宝暖
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The surface treatment of carbon steel screw fasteners used in anti-corrosion wood is usually electrolytic galvanized, then passivated by chromic acid, and then protected by organic coating. In addition to being beautiful, it can also reduce damage to the wood when it is penetrated. The surface layer of the screw is damaged, but the corrosion resistance of the anti-corrosion wood cannot reach a satisfactory level
In addition, the impact of the hexavalent chromium film on the environment caused by the passivation treatment of chromic acid cannot be ignored.

Method used

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  • Surface treatment method of carbon steel screw applied to preserving timber and structure, baking varnish coating formula
  • Surface treatment method of carbon steel screw applied to preserving timber and structure, baking varnish coating formula
  • Surface treatment method of carbon steel screw applied to preserving timber and structure, baking varnish coating formula

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Experimental program
Comparison scheme
Effect test

experiment example 1

[0055] Step 1: Firstly, the surface of the carbon steel screw is mechanically removed to remove rust spots or impurities, and the mechanical method includes machine cleaning and drying.

[0056] Step 2: bathing the carbon steel screw with the several corrosion inhibitors at high temperature to form a hexavalent chromium-free carbon steel screw. The temperature of the high-temperature co-bath is between 60°C and 80°C.

[0057] Step 3: adding the siloxane compound and the fluorine-containing surfactant mixture, and baking at 120-150° C. to form a highly smooth siloxane compound film on the surface of the carbon steel screw.

[0058] Step 4: The carbon steel screw is baked at 170-180° C. with the aforementioned baking varnish coating formula to form a protective layer on the surface of the carbon steel screw. The baking varnish coating formula includes a concentration of zinc metal particles of 5 g / L, a concentration of nickel metal particles of 0.2 g / L, and a concentration of alu...

experiment example 2

[0060] Step 1: Firstly, the surface of the carbon steel screw is mechanically removed to remove rust spots or impurities, and the mechanical method includes machine cleaning and drying.

[0061] Step 2: electrolytically plating a zinc metal layer of 7-8 microns on the surface of the carbon steel screw.

[0062] Step 3: bathing the carbon steel screw with the several corrosion inhibitors at high temperature to form a galvanized carbon steel screw treated without hexavalent chromium. The temperature of the high-temperature co-bath is between 60°C and 80°C.

[0063] Step 4: adding the siloxane compound and the fluorine-containing surfactant mixture, and baking at 120-150° C. to form a highly smooth siloxane compound film on the surface of the carbon steel screw.

[0064] Step 5: The carbon steel screw is baked at 170-180° C. with the aforementioned baking varnish coating formula to form a protective layer on the surface of the carbon steel screw. The baking varnish coating form...

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Abstract

The invention relates the surface treatment and structure of simple steel screw used in preserved timber. The method comprises the following steps: on the surface of simple steel screw, carrying out corrosion prevention and compactness treatment, and forming corrosion prevention structure. The corrosion prevention structure is made with the baking varnish coating formulation, and the formulation comprises zinc, nickel, aluminium, carbowax, siloxane compound, fluorine- interfacial active agent, fluorine-containing surfactants and addition agent.

Description

technical field [0001] The present invention relates to a carbon steel screw surface treatment method and structure, in particular to a carbon steel screw surface treatment method and structure for forming a uniform and dense covering protective layer, reducing film thickness and improving corrosion resistance, baking varnish coating formula. Background technique [0002] In order to resist outdoor wind, sun and beetle moth bites, wood needs to be treated with anti-corrosion. In the early days, the most common method was to use chromated copper arsenate (CCA) for wood anti-corrosion treatment. However, European and American countries have discovered the potential harm of CCA to human health and the environment, especially after children use these amusement facilities, they are likely to ingest chromium copper arsenate through hands and mouth, causing potential harm. Therefore, countries began to ban the use of chromium copper arsenate treated wood in some places such as pub...

Claims

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Application Information

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IPC IPC(8): C09D171/08B05D3/02B05D7/14
Inventor 苏宝暖
Owner 苏宝暖
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