CN103361583A

CN103361583A - Method for improving salt spray corrosion resistance of german silver

Info

Publication number: CN103361583A
Application number: CN2013102834910A
Authority: CN
Inventors: 宣夕文; 张玲俐; 左悦铭
Original assignee: Anhui Xinke New Materials Co Ltd
Current assignee: Anhui Xinke New Materials Co Ltd
Priority date: 2013-07-08
Filing date: 2013-07-08
Publication date: 2013-10-23

Abstract

The invention discloses a method for improving salt spray corrosion resistance of german silver, wherein the salt spray corrosion resistance of german silver is improved by increasing the manganese content of the material, reducing the surface roughness of the material, removing erodible substance on the surface and blocking or slowing down the galvanic reaction of the german silver material in a NaCl mist environment with concentration of 5%.

Description

A kind of method that improves the German silver salt spray corrosion resistance

Technical field

The invention belongs to metallic substance press working field, relate in particular to a kind of method that improves the German silver salt spray corrosion resistance.

Background technology

Because zinc white copper strips salt spray corrosion resistance is to propose first on the market at home, namely require product in the 5%NaCl salt mist environment 8 hours surfaces without corrosion, so do not have enough knowhows and correlation technique means.In the prior art, manganese content＜0.1%; Roll Ra＞0.2 μ m; The mixing roll abrasive material is aluminum oxide, and the shortcoming of prior art is that material manganese element content is on the low side, the product surface roughness is higher and surface grinding is processed not in placely, makes that German silver hot spot in salt spray corrosion test is many, corrosion condition is serious, as shown in Figure 4.

Summary of the invention

Technical problem to be solved by this invention provides a kind of method that improves the German silver salt spray corrosion resistance.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of method that improves the German silver salt spray corrosion resistance, the technological process of production of German silver is: and melting and casting → mill face → roughing cogging → thick cutting edge → process annealing → cleaning by degreasing → pre-finish rolling → process annealing → cleaning by degreasing → finished product is rolling → and finished products → stretch-bending straightening → finished product cleanings → itemize puts in storage, in the melting operation, the content of control manganese element, the weight percent of manganese element is 0.1 ~ 0.5%; In the finished product operation of rolling, use the roll of roughness Ra=0.13 ~ 0.25 μ m rolling; In the finished product cleaning process, use abrasive material to be the mixing roll of silicon carbide, mixing roll order number is 800 ~ 2000 orders.

The weight percent of manganese element is 0.1%, and gloss level of roll Ra=0.21 μ m uses silicon carbide abrasive, several 2000 orders of mixing roll order.

The weight percent of manganese element is 0.2%, and gloss level of roll Ra=0.19 μ m uses silicon carbide abrasive, several 1500 orders of mixing roll order.

The weight percent of manganese element is 0.5%, and gloss level of roll Ra=0.15 μ m uses silicon carbide abrasive, several 800 orders of mixing roll order.

The present invention is according to the mechanism of Zn-Cu-Ni alloy strip generation salt air corrosion, and the gordian technique reference mark is mainly concerned with horizontal casting, finished product is rolling and the finished product matting.This three process is optimized, thereby improved the salt spray corrosion resistance of German silver product, the German silver product that the method is processed does not have obvious hot spot or extent of corrosion lighter through salt air corrosion test rear surface, satisfied the requirement to the German silver salt spray corrosion resistance.

Description of drawings

Fig. 1 is the metallic surface state graph of German silver after the salt air corrosion test that embodiment one method is produced;

Fig. 2 is the metallic surface state graph of German silver after the salt air corrosion test that embodiment two methods are produced;

Fig. 3 is the metallic surface state graph of German silver after the salt air corrosion test that embodiment three methods are produced;

Fig. 4 is the metallic surface state graph of German silver after the salt air corrosion test that prior art is produced;

Embodiment

Embodiment one

The present embodiment provides a kind of method that improves the German silver salt spray corrosion resistance, the technological process of production of German silver is: and melting and casting → mill face → roughing cogging → thick cutting edge → process annealing → cleaning by degreasing → pre-finish rolling → process annealing → cleaning by degreasing → finished product is rolling → and finished products → stretch-bending straightening → finished product cleanings → itemize puts in storage, in the melting operation, the content of control manganese element, the speed of galvanic cell reaction occurs in manganese element in salt mist environment in order to slow down material, the weight percent of manganese element is 0.1%; In the finished product operation of rolling, use the roll of roughness Ra=0.21 μ m rolling, reduce the material surface roughness, reduce the contact area of material surface and salt air corrosion medium, reduce speed and the degree of salt air corrosion; In the finished product cleaning process, use abrasive material to be the mixing roll of silicon carbide, mixing roll order number is 2000 orders, reaches to reduce the easily purpose of erosion material of surface, and then slows down it to the booster action of material generation salt air corrosion reaction.

After the German silver of producing was processed in the 5%NaCl salt mist environment in 8 hours, the metallic surface state graph as shown in Figure 1, relative conventional processes, smooth surface, hot spot reduces, and extent of corrosion obviously alleviates, the finished product salt spray corrosion resistance is improved largely, satisfies basic demand.

Embodiment two

The present embodiment provides a kind of method that improves the German silver salt spray corrosion resistance, the technological process of production of German silver is: and melting and casting → mill face → roughing cogging → thick cutting edge → process annealing → cleaning by degreasing → pre-finish rolling → process annealing → cleaning by degreasing → finished product is rolling → and finished products → stretch-bending straightening → finished product cleanings → itemize puts in storage, in the melting operation, the content of control manganese element, the weight percent of manganese element is 0.2%; In the finished product operation of rolling, use the roll of roughness Ra=0.19 μ m rolling; In the finished product cleaning process, use abrasive material to be the mixing roll of silicon carbide, mixing roll order number is 1500 orders.

After the German silver of producing was processed in the 5%NaCl salt mist environment in 8 hours, the metallic surface state graph as shown in Figure 2, relative conventional processes, smooth surface, hot spot is few, extent of corrosion is very light, finished product satisfies basic demand.

Embodiment three

The present embodiment provides a kind of method that improves the German silver salt spray corrosion resistance, the technological process of production of German silver is: and melting and casting → mill face → roughing cogging → thick cutting edge → process annealing → cleaning by degreasing → pre-finish rolling → process annealing → cleaning by degreasing → finished product is rolling → and finished products → stretch-bending straightening → finished product cleanings → itemize puts in storage, in the melting operation, the content of control manganese element, the weight percent of manganese element is 0.5%; In the finished product operation of rolling, use the roll of roughness Ra=0.15 μ m rolling; In the finished product cleaning process, use abrasive material to be the mixing roll of silicon carbide, mixing roll order number is 800 orders.

After the German silver of producing was processed in the 5%NaCl salt mist environment in 8 hours, the metallic surface state graph as shown in Figure 3, relative conventional processes, smooth surface does not have obvious hot spot, extent of corrosion is very light, finished product meets the demands fully.

After adopting such method to process, according to the mechanism of copper-nickel alloy band generation salt air corrosion, the gordian technique reference mark is mainly concerned with horizontal casting, finished product is rolling and the finished product matting.This three process is optimized, thereby improved the salt spray corrosion resistance of copper-nickel alloy product, the copper-nickel alloy product that the method is processed does not have hot spot or extent of corrosion lighter through salt air corrosion experiment test rear surface, satisfied the requirement to the copper-nickel alloy salt spray corrosion resistance.

The above has carried out exemplary description to the present invention by reference to the accompanying drawings; obviously specific implementation of the present invention is not subjected to the restriction of aforesaid way; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; or without improving design of the present invention and technical scheme are directly applied to other occasion, all within protection scope of the present invention.

Claims

1. method that improves the German silver salt spray corrosion resistance, the technological process of production of German silver is: and melting and casting → mill face → roughing cogging → thick cutting edge → process annealing → cleaning by degreasing → pre-finish rolling → process annealing → cleaning by degreasing → finished product is rolling → and finished products → stretch-bending straightening → finished product cleanings → itemize puts in storage, it is characterized in that, in the melting operation, the content of control manganese element, the weight percent of manganese element is 0.1 ~ 0.5%; In the finished product operation of rolling, use the roll of roughness Ra=0.13 ~ 0.25 μ m rolling; In the finished product cleaning process, use abrasive material to be the mixing roll of silicon carbide, mixing roll order number is 800 ~ 2000 orders.

2. the method for raising German silver salt spray corrosion resistance as claimed in claim 1 is characterized in that, the weight percent of manganese element is 0.1%, and gloss level of roll Ra=0.21 μ m uses silicon carbide abrasive, several 2000 orders of mixing roll order.

3. the method for raising German silver salt spray corrosion resistance as claimed in claim 1 is characterized in that, the weight percent of manganese element is 0.2%, and gloss level of roll Ra=0.19 μ m uses silicon carbide abrasive, several 1500 orders of mixing roll order.

4. the method for raising German silver salt spray corrosion resistance as claimed in claim 1 is characterized in that, the weight percent of manganese element is 0.5%, and gloss level of roll Ra=0.15 μ m uses silicon carbide abrasive, several 800 orders of mixing roll order.