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Tin-brass alloy containing rare earth

A tin-brass and alloy technology, applied in the field of rare-earth-containing tin-brass alloys, can solve problems such as inevitable toxic and side effects, and achieve the effects of wide application range and improved corrosion ability

Inactive Publication Date: 2008-04-09
ZHEJIANG HAILIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is inevitable to have toxic and side effects on human health and the environment during the preparation process and use.

Method used

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  • Tin-brass alloy containing rare earth

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Embodiment Construction

[0019] Below with 2 embodiments of the present invention and the conventional product HSn70-1A on the market (being comparative example 1) and HSn70-1B (being comparative example 2) the composition (seeing table 1) of each component of two comparative examples and in different The comparative list of corrosion resistance performance index in corrosive medium is as follows (see table 2), to further illustrate the excellent performance of the present invention.

[0020] The chemical composition of table 1 embodiment and comparative example

[0021] Chemical composition (wt%)

[0022] The static corrosion rate (mm / a) of table 2 embodiment and comparative example in different media

[0023] NaCl (3.5%)

[0024] It can be seen from Table 2 that the rare earth tin-containing brass prepared in Examples 1 and 2 has better corrosion resistance than the common arsenic-containing tin brass HSn70-1A and HSn70-1B.

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Abstract

The invention relates to a rare earth stannum copper alloy, belonging to the technical field of the alloying of metal material and the anti-corrosion; the invention comprises copper, zinc, stannum, aluminum, nickel, manganese, antimony, boron, mischmetal containing mainly light rare earth elements such as lanthanum and cerium, each component element takes up the weight proportion as: copper 69-71%, stannum 0.5-1%, aluminum 0.1-0.5%, nickel 0.1-0.5%, manganese 0.1-0.6%, antimony 0.01-0.05%, boron 0.002-0.02%, mischmetal containing mainly light rare earth elements such as lanthanum and cerium 0.02-0.2%, the rest is taken by zinc and impurity with the total volume of no greater than 0.05%, the sum up of each component element is 100%. The invention aiming at the high corrosion resistance requirements by a condenser tube for heat exchange, via optimized design and multiple test, is finished to improve the anti-stress corrosion rupture performance, and level up the anti high C1-, NH4+, S2- ion density corrosion performance of polluted water.

Description

technical field [0001] The invention relates to a brass alloy containing rare earth tin, which belongs to the technical field of alloying of metal materials and anticorrosion of materials. Background technique [0002] Copper alloys such as HSn70-1 and HA177-2 brass have good thermal conductivity and corrosion resistance, so they are widely used as condenser tube materials for heat exchangers in coastal power plants and ships. In order to suppress the selective dezincification and dissolution of brass for many years, it is common to add trace amounts of As and B to improve the corrosion resistance. However, As is highly toxic and an environmentally unfriendly substance. Its volatilization in the production process is very harmful to human health, so it should be avoided. Studies have shown that only adding boron cannot completely inhibit the dezincification of brass, so it is necessary to further improve the corrosion resistance of tin brass and find suitable alloying eleme...

Claims

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Application Information

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IPC IPC(8): C22C9/00
Inventor 曹建国程建奕赵学龙
Owner ZHEJIANG HAILIANG
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