Unlock instant, AI-driven research and patent intelligence for your innovation.

Hot galvanizing production process

A production process, hot-dip galvanizing technology, applied in hot-dip galvanizing process, metal material coating process, coating, etc., can solve the problems of strong corrosion, easy damage of coating roller surface, uneven roller coating, etc., and achieve a solution Corrosion, avoid splash, easy to control effects

Active Publication Date: 2020-04-07
SHANGHAI MEISHAN IRON & STEEL CO LTD
View PDF11 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the liquid used in chromic acid passivation is different from the existing custom-made post-treatment liquid. Unfavorable Factors of Roller Surface Damage
It causes uneven roller coating, difficult to control the coating weight, and the surface of the coating roller is easily damaged, making the product difficult to produce

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0022] A kind of hot-dip galvanizing production process of the present embodiment, carries out following steps:

[0023] 1) Loading and checking the raw material, the raw material is strip steel;

[0024] Loading workers should check the raw materials:

[0025] The outer surface of the steel strip must not be stuck with oil stains (especially oil stains such as asphalt oil blended paint), emulsion spots, and iron oxide scales. Otherwise it will result in substandard products.

[0026] 2) Alkaline cleaning of the upper and lower surfaces of the steel strip, spray cleaning of the upper and lower surfaces of the steel strip with lye with a sodium hydroxide content of 1.0-1.5%, electrolytic cleaning in the lye, and hot water rinsing of the strip after alkali washing , Hot air drying; this process mainly cleans and cleans the oil on the surface of the strip steel, so that the surface of the strip steel is clean and dry before entering the furnace.

[0027] 3) The strip after dry...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a hot galvanizing production process, and belongs to the technical field of cold rolling continuous hot galvanizing. The hot galvanizing production process comprises the following steps that 1), feeding and raw material inspecting are carried out; 2), strip steel is subjected to alkali washing, and water washing is carried out on the strip steel subjected to alkali washing; 3), the strip steel is subjected to preheating, direct fire heating, radiation heating and rapid cooling in a furnace section; 4), hot galvanizing is carried out; 5), the strip steel is subjected toflattening and straightening, so that the surface of the strip steel obtains a certain flatness, and the sheet shape of the strip steel achieves a certain flatness; 6), passivating treatment is carried out; 7), drying is carried out; 8), inspecting is carried out; and 9), winding and packaging are are carried out. According to the process, the clockwise coating mode is adopted, so that the situation that when the anticlockwise coating mode is adopted, the friction between the roller surface of a coating roller and the strip steel and between the roller surface of the coating roller and a liquid taking roller enables the roller surface of the coating roller to be quickly damaged, and then the roller coating process is difficult to perform is avoided; and the ratio is confirmed to be different from the past ratio by confirming the conductivity, so that the thickness of a passivation layer is easy to control.

Description

technical field [0001] The invention relates to a hot-dip galvanizing production process, which belongs to the technical field of cold-rolling continuous hot-dip galvanizing. Background technique [0002] In the hot-dip galvanizing production process, in order to further improve the corrosion resistance of the product, the surface of the galvanized product is generally further treated. Among them, chromic acid passivation is one of the post-treatment methods, which is characterized by low cost. It has good anti-rust effect and is welcomed by the market. [0003] In the production of hot-dip galvanizing, four-roller roller coating machine is generally used to carry out roller coating treatment on strip steel-3. The surface of coating roller-1 is generally made of rubber material, and the liquid-taking roller-2 is a steel surface with a certain roughness. Through the rotation of the pick-up roller-2, the liquid in the paint pan-5 is transferred to the coating roller-1, and th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/06C23C2/02C23C2/20C23C2/26C23C22/24
CPCC23C2/02C23C2/06C23C2/20C23C2/26C23C22/24
Inventor 何锐孙磊
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD