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Surface treatment solution composition containing trivalent chromium and inorganic compound, and method for manufacturing hot dip galvanized steel sheet surface-treated using same

A hot-dip galvanized steel sheet and surface treatment technology, which is applied in the field of hot-dip galvanized steel sheet and surface treatment solution composition, can solve the problems of discoloration and discomfort, and achieve excellent weldability and alkali resistance

Active Publication Date: 2021-06-08
浦项股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composition contains a porous silica component, so it is not suitable for Mg, Al alloys that undergo severe discoloration in a humid atmosphere
The porous silica has strong hygroscopic properties, so there is a problem of causing rapid discoloration on Mg, Al, Zn alloy steel sheets

Method used

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  • Surface treatment solution composition containing trivalent chromium and inorganic compound, and method for manufacturing hot dip galvanized steel sheet surface-treated using same
  • Surface treatment solution composition containing trivalent chromium and inorganic compound, and method for manufacturing hot dip galvanized steel sheet surface-treated using same
  • Surface treatment solution composition containing trivalent chromium and inorganic compound, and method for manufacturing hot dip galvanized steel sheet surface-treated using same

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Embodiment

[0057] 1. Changes in physical properties depending on the content of trivalent chromium compounds

[0058] In order to test the changes in the physical properties of the contents of each component of the surface treatment solution composition according to the present invention, the following surface treatment solution composition is prepared: the surface treatment solution composition comprises a trivalent chromium compound, a vanadium series antirust and corrosion resistant agent, Colloidal silica, silane coupling agent, polysiloxane copolymer and water, wherein, the trivalent chromium compound is chromium nitrate and chromium phosphate, and the vanadium series antirust and corrosion resistant agent is vanadium acetylacetonate, so The colloidal silicon dioxide is Ludox HAS (snowtex-O), and the silane coupling agent is a mixture of tetraethyl orthosilicate and 3-glycidoxypropyltrimethoxysilane in a weight ratio of 1:1. A mixture, the polysiloxane copolymer is a polysiloxane co...

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Abstract

The present invention provides a surface treatment solution composition comprising: 30 to 51 wt% of a trivalent chromium compound comprising chromium phosphate (A) and chromium nitrate (B) and having a content ratio of A / (A + B) that satisfies 0.3 to 0.6; 5 to 15 wt% of silane coupling agent; 0.2 to 3 wt% of vanadium-based anti-corrosive rust inhibitor; 3 to 12 wt% of colloidal silica; 0.5 to 5 wt% of polysiloxane copolymer; and 14 to 61.3 wt% of water, a hot dip galvanized steel sheet surface-treated using same, and a manufacturing method thereof. The hot dip galvanized steel sheet treated with the surface treatment solution composition containing trivalent chromium has an excellent corrosion resistance, blackening resistance, pipe-forming oil reactivity, and alkali resistance.

Description

technical field [0001] The invention relates to a high corrosion resistance surface treatment solution composition containing trivalent chromium and an inorganic compound, and a method for manufacturing a hot-dip galvanized steel sheet for surface treatment using the composition. Background technique [0002] A hot-dipped material forming a galvanized (Zn) layer has excellent corrosion resistance due to a protective effect of sacrificial corrosion protection of base iron, and thus is widely used as a building material. However, the exposed surface of the hot-dip plated material is formed of Zn, and therefore, when exposed to a general corrosive environment, especially a humid atmosphere, white rust as zinc oxide is easily generated on the surface, making the quality characteristics of the material worse. In addition, when the galvanized material is exposed to a high-temperature and high-humidity environment, it is prone to blackening, in which the surface color changes to b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/08C23C2/06C23C2/40C23C28/00C09D5/08C09D183/04
CPCC09D183/04C23C2/06C23C2/40C23C28/00C09D5/084C23C2/26C23C28/3225C23C28/345C23C2222/10C23C2222/20C23C22/42C23C22/40C23C22/08C23C28/34C09D7/61C08K3/28C08K3/36C08K5/07C08K13/02C08K2003/328C08K2201/014C09D5/086C23C22/28B05D3/0281B05D2202/10B05D1/185B05D3/02B05D3/0254C23C22/30C23C22/26B32B15/08C23C22/53C23C22/56B05D3/0209B05D3/0272B32B15/013B32B15/04C23C22/05B32B15/012B05D1/18B05D3/007C23C22/82B32B15/18Y10T428/24967Y10T428/264Y10T428/12556Y10T428/2495Y10T428/263Y10T428/12569Y10T428/12757Y10T428/12799Y10T428/265
Inventor 曺秀铉李康慜
Owner 浦项股份有限公司
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