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Atmospheric corrosion resisting industrial pure Sn and application thereof

A technology of atmospheric corrosion resistance and atmospheric corrosion resistance, applied in the field of industrial pure tin, can solve problems such as poor surface corrosion resistance, achieve good corrosion resistance and improve the effect of atmospheric corrosion resistance

Inactive Publication Date: 2014-06-25
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem of poor surface corrosion resistance of existing industrial pure Sn in a corrosive atmospheric environment, the invention provides a corrosion-resistant industrial pure Sn and its application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A tin alloy resistant to atmospheric corrosion was prepared by using industrial No. 1 tin as raw material, adding 0.02% Ga (weight percentage, the same below) and 0.02% Ni. After heating and melting industrial pure tin in a graphite crucible with a muffle furnace, add proportioned microalloying elements, dissolve and stir to make it homogeneous, and then cast it in a small graphite plate with a diameter of Φ20mm, and the ingot is about 5mm high After cooling, the ingot with a bright surface was obtained, and the sample was corroded with salt spray (spray once every 30 minutes). After 5 days, the surface still remained bright, indicating that the alloy surface had good corrosion resistance.

Embodiment 2

[0021] Industrial No. 2 tin was used as raw material, 0.007% P was added, and the method described in Example 1 was used for testing, and the corrosion resistance was good.

Embodiment 3

[0023] Adopt industrial special grade tin as raw material, add 0.01% Ge and 0.01% Si to adopt the same method in embodiment 1 to carry out test, obtain good effect.

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PUM

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Abstract

The invention relates to the field of preparation of non-ferrous metal materials, in particular to atmospheric corrosion resisting industrial pure Sn added with trace elements and application of the industrial pure Sn, solving the problem that the conventional industrial pure Sn is poor in surface corrosion-resistance in a corrosive atmospheric environment. Microalloy elements (one or combination of more of Ti, Al, P, Ge, Si, Ni and Ga) which resist surface corrosion are added into the conventional industrial pure Sn, wherein the additive amount of the microalloy elements is 0.001-0.10% (by weight percentage). Compared with the common industrial pure Sn, the atmospheric corrosion resisting industrial pure Sn has the advantages of good surface corrosion-resistance and capability of being widely applied to preparing electronic welding fluxes which are applied under the corrosive environment, and is suitable for preparing various Sn-base alloy artware and the like which resists surface corrosion.

Description

technical field [0001] The invention belongs to the field of preparation of nonferrous metal materials, in particular to industrial pure tin added with trace elements and resistant to atmospheric corrosion and its application. Background technique [0002] Tin is a metal with a wide range of uses, and tin-based alloys are mainly used for solder preparation. In recent years, due to the rapid development of the electronics industry, the amount of tin used for electronic solder is also increasing rapidly. In addition, tin is also used in many industrial fields such as the surface coating of metal products and the manufacture of Sn handicrafts. In some corrosive atmospheric environments, such as those exposed to marine atmospheric environments or industrially polluted areas, atmospheric corrosion will occur on the surface of Sn-based alloys in the presence of surface water films. This surface corrosion phenomenon has varying degrees of impact on various related industrial produ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C13/00
Inventor 冼爱平
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI