Coating and anti-corrosion method for steel products

A technology for anti-corrosion and steel materials, which is applied in the field of steel pipe piles, can solve the problems of insufficient matching of anti-corrosion belts, gaps between anti-corrosion belts and steel materials, and poor adhesion, so as to prevent the reproduction of organisms and achieve good anti-corrosion performance , good compactness effect

Active Publication Date: 2009-10-21
株式会社那卡波技工 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the anti-corrosion tape is directly wound on the surface of the steel and then covered with a protective cover, and the surface of the buried steel is uneven due to corrosion and pitting, the anti-corrosion tape cannot fully match the surface of the steel, thus Lead to poor adhesion and gaps between the corrosion protection tape and the steel
In addition, this part will be deformed due to external impact, etc., which will also cause a gap between the corrosion protection belt and the steel.

Method used

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  • Coating and anti-corrosion method for steel products
  • Coating and anti-corrosion method for steel products
  • Coating and anti-corrosion method for steel products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment takes steel pipe piles or steel sheet piles 8 steel materials built in oceans and rivers as an example: figure 1 As shown, a pasty mineral lipid anti-corrosion material 1 is coated on its surface, and a strip-shaped mineral lipid anti-corrosion tape 2 is wound on it, and then the protective cover 4 and the inner surface of the protective cover are further used. The buffer material 5 that foam plastic material or rubber constitutes wraps.

[0029] see figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 , Figure 8 As shown: the upper and lower ends of the protective cover 4 are filled with water-curable resin 7 to seal the mineral lipid anti-corrosion material 1 . There are fixed flanges on both sides of the protective cover 4. At the joint position of the flanges, a plate 3 made of plastic or fiber reinforced plastic is added to connect the belt-shaped mineral grease anti-corrosion belt 2 and the buffer. The plate 3 made of plastic or fiber-re...

Embodiment 2

[0045] Determination of anti-corrosion effect:

[0046] Place the 4 steel pipes in the splash zone at the positions of +3.55m, +2.95m, +1.70m, +1.10m, and at the same time use the method of Example 1 to protect the above 4 steels, and take them back after 1168 days. Corrosion weight loss to calculate corrosion rate.

[0047] The unprotected steel was used as a control, which was also placed in the above four different locations, and retrieved after 1168 days, and the corrosion rate was calculated from the weight loss of the test piece.

[0048] Calculation method of anti-corrosion effect:

[0049] Corrosion protection rate (%)=[(corrosion rate of control)-(corrosion rate of test)]×100 / (corrosion rate of control)

[0050] The results are shown in the table below

[0051] tide level

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Abstract

The invention relates to a coating anti-corrosion method for steel materials arranged in oceans, lakes, rivers and the like. First, paste mineral grease anti-corrosion material is applied on the surface of the steel, and a strip-shaped mineral oil anti-corrosion tape is wound on it, and then the protective cover and the foam plastic material or plastic material arranged on the inner surface of the protective cover are used Covered with cushioning material made of rubber. The anti-corrosion method of the invention can protect steel structures in water bodies such as oceans, rivers and lakes from corrosion in a long-term, efficient and stable manner.

Description

technical field [0001] The invention relates to a coating and anticorrosion method for steel pipe piles and steel sheet piles arranged in oceans, lakes, rivers and the like. Background technique [0002] Steel pipe piles and steel sheet piles are generally used for foundation piles, piers, pier piles and bank revetments of platforms built in oceans, lakes and rivers. The cathodic protection method can be used to effectively prevent corrosion for the part immersed in the water surface for a long time, but it is difficult to use this method to effectively prevent corrosion for the tidal range area and spray splash area where the tide rises and falls. Regarding the traditional anti-corrosion measures in this part, the following three methods are mainly adopted. The first method is cladding with cement mortar including concrete. However, the coating of cement mortar will cause the salt concentration in the mortar to increase and the pH to decrease due to the infiltration of se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/08
Inventor 大野泰彦侯保荣
Owner 株式会社那卡波技工
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