Pretreatment for coating iron and steel member
A technology for steel components and coating, applied in the direction of metal material coating process, etc., can solve the problems that the phosphating effect cannot be comprehensively improved, the oxide residue is difficult to be thoroughly cleaned, and the edge and corner treatment proposes any improvement, etc., and achieves a good economy. Value, avoid rapid corrosion, process stability with guaranteed results
Inactive Publication Date: 2009-08-26
徐州兰德交通科技有限公司
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Problems solved by technology
However, the problems of high cost, difficult control and unsatisfactory phosphating effect have always existed, and this method has been difficult to be recognized by most people.
Chinese patent 200310116083.2 is a powder spraying process for processing metal parts. The added degreasing process can improve the phosphating effect to a certain extent, but the phosphating effect cannot be obtained because the oxide residues adhering to the surface of the workpiece are difficult to be completely cleaned. comprehensive improvement, and the invention does not propose any improvement measures for corner treatment
People have adopted methods such as galvanizing metals and replacing steel with alloys, but this has significantly increased construction costs and caused more serious environmental pollution problems, and can only solve a few high-standard and high-standard material requirements. Corrosion problem has been difficult to solve
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[0026] The process includes: edge treatment shot blasting skim washed pickling washed Table tone Phosphating washed hot water wash painting;
[0027] First, the corners of the steel components are processed, and the various sides and corners of the steel workpiece are polished by manual operation with various grinders, angle grinders, and polishers to form a certain radian;
[0028] Shot blasting treatment adopts hanging passing type, eight blasting heads, spherical steel shot, diameter 0.1-1.0mm, and shot blasting time is 2-3 minutes;
[0029] Degreasing is done by immersion, and the degreasing agent produced by Gaoyou is used to dilute the tank with a concentration of 0.5%, and the treatment temperature is 60-65°C. The compressed air pipe is used to promote the flow of the tank liquid. After cleaning for 8 minutes, a normal temperature water wash is carried out, followed by pickling program;
[0030] Pickling is to use chemically pure hydrochloric acid w...
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Abstract
The invention discloses a pretreatment process for coating steel components. The process flow is: corner treatment → shot blasting → degreasing → water washing → pickling → water washing → surface adjustment → phosphating → water washing → passivation → hot water washing → painting. The problem of rapid corrosion of joint corners that generally occurs after painting. Pickling steps, degreasing steps are adopted, and the processing efficiency is high.
Description
technical field [0001] The invention relates to a pretreatment process technology for coating steel components, and belongs to the technical field of metal surface treatment. Background technique [0002] Metal corrosion is a spontaneous metallurgical reverse process, which has brought huge economic losses and social harm to human beings. On the basis of fully applying modern electrochemical and material science theories and experimental methods, people have summarized the basic laws of metal corrosion, established and developed metal corrosion theories, and then used these theories to research, develop and popularize many classic and modern methods. Anti-corrosion new technology. In the past 30 years, coating protection has achieved rapid development and has become the most effective, economical and widely used technology to reduce corrosion losses. Coating technology in coating protection has been more and more widely used, and One of the most important processes is the ...
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IPC IPC(8): C23G1/08C23G5/02C23C22/07B24B1/00B24C1/00
Inventor 陆东方晁兵
Owner 徐州兰德交通科技有限公司