脱锌

Finally, the mechanism of dezincification related to the SCC of brass in nitrate solution is discussed.

文中还讨论了黄铜在亚硝酸盐溶液中SCC过程的脱锌机理。

It has long been known that the poor corrosion resistance of brass in certain environment is due to the phenomenon of dezincification.

采用显微组织分析和脱锌腐蚀实验方法，研究了不同铋含量对黄铜的微观组织以及黄铜脱锌腐蚀性能的影响。

Dezincification is normally associated with brass valves where the zinc content exceeds 15%.

脱锌现象通常发生在锌含量超过15%的黄铜阀门上。

The effect of cold-deformation amount and annealing temperature on the dezincification of the unleaded free-cutting brass were investigated.

采用脱锌腐蚀深度测量方法，光学显微镜分析和SEM等分析方法，研究了不同的冷变形量和退火温度对无铅易切削铋黄铜的耐脱锌腐蚀性能的影响。

To begin with the phenomenon and characteristics of dezincification of brass, the review is made on the mechanisms, prevention and influence factors of dezincification .

从黄铜脱锌的现象、特征及其影响因素出发，对黄铜脱锌的优先溶解机制、溶解－再沉积机制、双空位机制和渗流机制等进行了描述。

In this paper, the dezincification corrosion resistance of Mg-Sb brass was investigated by the methods of dezincification corrosion depth testing, optical microscope, SEM and XRD.

采用脱锌腐蚀深度测量方法、光学显微镜、SEM和XRD等分析方法，研究了镁锑黄铜的脱锌腐蚀性能和添加少量Sn、Al元素对其耐腐蚀性能的影响。

The results show that Bi and Sb are mainly distributed on grains and grainboundaries, and Bi on grainboundaries there are mainly simple substance Bi particles, Sb in grains are intermetallics containing stibium. The tensile strength, yield strength, elongation and variation of area of halfhard brass containing bismuth and stibium are 478.9 MPa, 295 MPa, 15.1% and 29.3% respectively. Corresponding to HPb59-1, the cutting property of brass containing bismuth and stibium is excellent. The brass containing bismuth and stibium shows excellent dezincification corrosion resistance, and the depth is 323 μm.

结果表明：添加的Bi和Sb主要以单质或化合物方式存在于无铅黄铜的相内和相界处，Bi以单质颗粒存在于相界处，Sb以化合物形式存在于相内，这对提高合金切削性能有利；添加Bi和Sb黄铜的抗拉强度为478.9 MPa，伸长率为15.1%，断面收缩率为29.3%，屈服强度大约为295 MPa；添加Bi和Sb黄铜的切削性能比HPb59-1铅黄铜的优，合金的脱锌腐蚀性能良好，脱锌层厚度约为323 μm。

By considering the effect of different binders,basicity,reduction temperature and time on the compression strength and dezinc degree after reducing,find out the best scheme A1B3C3D3 and get the metallic pellets with higher compression strength and dezinc degree .

通过研究不同粘结剂、碱度、还原温度和还原时间对熟球抗压强度、脱锌率的影响，找出最佳试验方案为A1B3C3D3，得到脱锌率和抗压强度较高的金属化球团。

According to the property of mud of gas of plum steel blast furnace, undertook to its zincic experiment studies receiving iron to fall, no matter use magnetic separation,the result makes clear or classification the law all can reclaim from which content of major iron ore and purify is major zinc, stock of will tall zinc, low zinc undertakes effective depart, iron concentrate yield and grade all achieve 52% above, iron metal reclaims rate 70%, take off zinc to lead 50% above.

梗概： 介绍了梅钢高炉瓦斯泥的性质、试验情况及结果，国内外处理使用含锌高炉瓦斯泥的方法。根据梅钢高炉瓦斯泥的性质，对其进行了收铁降锌的试验探究，结果表明无论用磁选还是分级法均能从中回收大部分铁矿物并去除大部分锌，将高锌、低锌物料进行有效分离，铁精矿产率和品位均达到52%以上，铁金属回收率70%，脱锌率50%以上。

However, this problem has returned with the increased use of high-zinc alloys(commonly referred to as ' Yellow Brass')in forged and cast valves typically produced outside the United States.

合金腐蚀，称为&脱锌现象&，在50年代已经在阀门产品上有效根除，但是，由于当今在世界上一般生产的锻造和铸造阀门产品上，高锌合金的使用增加，现在这个问题又开始回潮。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。