The physical attributes of an in-service valve with Dezincification includes a white powdery substance or mineral stains on its exterior surface. 使用中的阀门出现失锌想象时的物理特征包括:在外表面出现白色粉末或矿物污点。
"High Copper, Low Zinc Brass Castings for Dezincification Resistance" 锌含量低的高纯度的铜铸件,有效防止锌泄漏
EPMA Analysis of the Dezincification Corrosion of Condenser Copper Alloy Tubes mill-coated pipe 电厂凝汽器铜管脱锌腐蚀的电子探针分析制管厂已涂层的管子
Dezincification selectively removes zinc from the alloy, leaving behind a porous, copper-rich structure that has little mechanical strength. 脱锌现象有选择的从合金中去除锌元素,造成多孔、富铜结构,降低了机械强度。
To overcome the problem special copper alloys, which contain an inhibitor and undergo heat treatment, have been developed which are resistant to corrosion by dezincification. 为了解决这个问题,已经开发出一种特殊的铜合金,内含一种抑制成分,并经过热处理,能够抵御脱锌现象的侵蚀。
Dezincification of duplex brass, which is a form of corrosion, may occur when in contact with certain aggressive waters. 两相黄铜的脱锌现象,是一种侵蚀的现象,当接触某种侵蚀性水时可能会发生这种现象。
The results show that the main cause of the original corrosion leakage of H68A condenser brass copper tubes is dezincification and. 结果表明,造成H68A凝汽器黄铜管腐蚀泄漏的主要原因是脱锌腐蚀。
Optical microscope, SEM and EPMA are used to investigate the corrosion behavior of the Mg-Sb brass in the CuC12 solution and the effect and mechanism of Al, Sn on the process 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。
Copper-zinc alloys& Determination of dezincification corrosion resistance GB/T10119-1988黄铜耐脱锌腐蚀性能的测定
The paper presents some results obtained from a research about effects of rare-earth ( RE) and boron ( B) refining on the microstructure and dezincification corrosion properties of casting lead brass. 研究了加入稀土和硼细化处理对铸造铅黄铜组织和脱锌腐蚀性能的影响。
An in service valve suffering from Dezincification has a white powdery substance or mineral stains on its exterior surface. 应用中的阀门如果出现脱锌现象,在产品表面就会出现粉状物质或矿物污点。
The role of boron in inhibiting dezincification of aluminium brass was investigated by ICP, XRD, EMPA and PAT methods. By adding trace boron into aluminium brass with or without arsenic, the resistance of the brass against this type of selective corrosion could be remarkably improved. 采用ICP,XRD,EMPA,PAT等方法研究了加硼对铝黄铜脱锌行为的影响和机理。
Atomic absorption spectroscopy was used to determine the dezincification coefficient of 70/ 30 brass subjected to slow-strain rate stress corrosion tests in 1 normal aqueous sodium nitrite solution over the potential range from-0.1~+ 0.1V ( SCE). 用原子吸收光谱测定了在慢应变速率的应力腐蚀试验条件下,70/30黄铜在1当量亚硝酸钠水溶液中,电位范围&0.1~+0.1V(SCE)内的脱锌系数。
Advances in researches of dezincification mechanism of brass 黄铜脱锌腐蚀机理的研究进展
A positron lifetime study on the mechanism of α-brass dezincification 用正电子湮没研究含砷α黄铜的脱锌机制
Effects of different processing techniques on corrosion resistance of Pb-free brass have been investigated by dezincification corrosion depth testing, potential tests, optical microscope and SEM. 采用脱Zn腐蚀深度测量方法、恒电位测试方法、光学显微镜和SEM等分析方法,研究了不同的加工工艺对无铅易切削铋黄铜的耐脱Zn腐蚀性能的影响。
The inhibiting effect of arsenic on the dezincification of H_ ( 62) and H_ ( 68) brass has been investigated by electrochemical and surface analysis techniques. 应用电化学和表面分析技术研究了砷对H(62)与H(68)黄铜脱锌效应研究。
The results show that the failure of oil-cooler is bolt-like dezincification corrosion. 结果表明,冷油器铜管的腐蚀属于栓状脱锌腐蚀。
Inhibiting Effect of Molecular Structure of Benzothiazoles on Dezincification of Brass 苯并噻唑类化合物分子结构对黄铜脱锌腐蚀抑制作用的影响
The corrosion rate, dezincification coefficient and polarization curves of boron modified HA177-2 brass with and without surface film were measured; 测定了成膜前后加硼HA177-2铝黄铜的静态腐蚀速率、脱锌系数和电化学行为。
The vacancy mechanism of the brass dezincification and the inhibition of brass dezincification by arsenic have been discussed. 讨论了黄铜脱锌及砷抑制脱锌的空位体扩散机制。
The preferential solution of zinc and solution-redeposition mechanism, divacancy mechanism and percolation model of dezincification of brass were summarized. The methods of inhibiting dezincification are introduced. The effect of As, B and RE elements on the process of dezincification is also analyzed. 综述了黄铜脱锌腐蚀的优先溶解和溶解-再沉积机制、双空位机制和渗流模型,介绍了抑制黄铜脱锌腐蚀的方法以及微量砷、硼元素对抑制黄铜脱锌腐蚀的作用。
Effect of hydrogen on stress induced by dezincification layer on brass 氢对黄铜脱锌层引起拉应力的影响
The results show that dezincification corrosion resistance of cold-drawing Bi-brass is worse than that of hot-rolled Bi-brass and as-cast Bi-brass as a results of β phase distributed along cold-working direction and the increase of dislocation density and residual stress. 结果表明,冷拔态的铋黄铜,由于β相沿着冷加工方向分布,同时位错密度和残余应力的增加,导致了其耐脱Zn腐蚀性能比热轧态的黄铜和铸造态的黄铜差。
Role of boron in inhibiting dezincification of aluminium brass 硼抑制铝黄铜脱锌机理的研究
A radiotracer study of dezincification of brass subjected to stress corrosion cracking 用放射性示踪技术研究黄铜应力腐蚀过程的脱锌
On the volume diffusion mechanism during dezincification of brass 黄铜脱锌体扩散机制研究
The results showed that extensive dezincification occurred in all the tests but potential had opposite effects on the dezincification coefficient and susceptibility to stress corrosion cracking; an increase in potential accelerated crack velocity but depressed the dezincification coefficient. 结果表明,所有试验都发生严重脱锌,但是,电位对脱锌系数和应力腐蚀开裂敏感性的作用影响相反:提高电位加速裂纹扩展,却降低了脱锌系数。
Inhibition of Dezincification of Brass 黄铜脱锌的抑制
Both copper foil and brass plate have the phenomenon of dezincification, the copper foil had more serious corrosion than brass plate than in the acid environment. 铜箔和黄铜板都有脱锌腐蚀的现象发生,铜箔在酸性气体中的腐蚀程度比黄铜板要严重的多。