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Method for slowing down oxidation corrosion on surface of lead ingot

A technology for surface oxidation and lead ingots, applied in the field of metallurgy, can solve problems such as affecting product sales, extremely high requirements for corrosion inhibitor selection, affecting the appearance quality of lead, etc., and achieves the effect of low cost, low price and good surface quality.

Active Publication Date: 2017-02-22
YUNNAN CHIHONG RESOURCE COMPREHENSIVE UTILIZATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 3. During the transportation and storage of lead ingots, the white, off-white or yellow-white films formed on the surface are determined by the natural oxidation properties of lead and are not used as a basis for scrapping
[0006] Although the appearance of lead metal and lead-containing materials is not used as the basis for scrapping, whitening, yellowing or blue marks will affect the appearance quality of lead and affect product sales. At present, the research literature on the oxidation and corrosion resistance of metal surfaces in China proposes that "corrosion inhibitor However, due to the extremely high requirements for the selection of corrosion inhibitors under different metals and different production conditions, the technology successfully applied to the production and transportation of lead ingots to slow down the oxidation and corrosion of lead ingots has not been reported.

Method used

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  • Method for slowing down oxidation corrosion on surface of lead ingot
  • Method for slowing down oxidation corrosion on surface of lead ingot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: "1g / L concentration"

[0029] (1) To prepare a cooling solution, slowly add 1kg of X-R (Sichuan Shifang Chuanhong Phosphorus Chemical Co., Ltd.) into a container filled with water, and at the same time stir evenly, set the volume to 1000L and place it for use;

[0030] (2) The qualified lead liquid after refining carries out ingot casting by casting machine;

[0031] (3) The lead ingot on the ingot casting machine is demoulded after natural cooling for a certain period of time;

[0032] (3) The lead ingot after demoulding is put into the water tank that fills the prepared solution by hoisting tools for overall cooling, and the soaking time is controlled to be lifted after 6 seconds;

[0033] (4) Dispose of the residual solution on the surface during the lifting process after soaking the lead ingot;

[0034] (5) Select lead ingots with qualified internal quality, bright surface, sides, and bottom without blue marks, white water marks, and yellowing for packa...

Embodiment 2

[0036] Embodiment 2 "3g / L concentration"

[0037] (1) Prepare the cooling solution, slowly add 3kg of phosphate substance into the container filled with water, stir evenly at the same time, set the volume to 1000L and place it for later use;

[0038] (2) The qualified lead liquid after refining carries out ingot casting by casting machine;

[0039] (3) The lead ingot on the ingot casting machine is demoulded after natural cooling for a certain period of time;

[0040] (3) The lead ingot after demoulding is put into the water tank that is filled with the prepared solution by hoisting tools for overall cooling, and the soaking time is controlled to be lifted after 3 seconds;

[0041] (4) Dispose of the residual solution on the surface during the lifting process after soaking the lead ingot;

[0042] (5) Qualified lead ingots are packed and shipped.

[0043] (6) Lead ingots can maintain good surface quality for 11 days under high temperature (80°C) and high humidity (80%) cond...

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Abstract

The invention relates to a method for slowing down oxidation corrosion on a surface of a lead ingot. A phosphate substance and water are prepared to water solution with a concentration of 0.5-3 g / L to serve as cooling solution of the lead ingot under normal temperature; after the lead ingot is naturally cooled and demolded, the solvent is used for cooling the lead ingot by 3-6 seconds; and the cooled lead ingot has no blue mark, white water mark and yellowing phenomenon, and forms a protective film on the surface for slowing down the oxidation corrosion phenomenon of the lead ingot under the hot and humid conditions of high-temperature, so that the excellent surface quality is maintained by 10-15 days, and the customer satisfaction is effectively improved. The method can realize no blue mark, white water mark and yellowing phenomenon on the lead ingot, slows down the oxidation corrosion speed of the surface of the lead ingot under the hot and humid transportation conditions of high temperature, prolongs the excellent surface quality of the lead ingot to reach 10-15 days, and meanwhile, has such characteristics as simple process flow, convenience for operation, economy and environmental protection.

Description

technical field [0001] The invention relates to a method for slowing down oxidation and corrosion on the surface of lead ingots, which belongs to the field of metallurgy. Background technique [0002] During the storage and transportation of lead metal and lead-containing materials, they are often affected by rain, high temperature, and high humidity. Oxidation and corrosion will occur on the lead surface, resulting in lead carbonate, lead hydroxide, basic lead carbonate, etc. Whitening and yellowing phenomenon, blue marks will also appear in the casting process of lead ingots, which will affect the appearance quality of lead. In view of this situation, its transportation and storage have the following standards: [0003] 1. Lead ingots should be shipped in non-corrosive transport vehicles to prevent them from being exposed to rain. [0004] 2. Lead ingots should be stored in a ventilated, dry, non-corrosive storage room. [0005] 3. During the transportation and storage o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D30/00
CPCB22D30/00
Inventor 赵红梅张梅薛灿董铁广李建伟魏源杨小芳韩冰莓彭情亮杨树泉杨丛刚杨大志李宗兴翟琳娜闫建英
Owner YUNNAN CHIHONG RESOURCE COMPREHENSIVE UTILIZATION CO LTD