镀锌层

Galvanized steel was one of the first of the clad steels.

镀锌覆层钢是最早一种双层钢之一。

Zinc coating, or galvanizing, is a cheap and effective method of protecting steel from corrosion.

锌层或镀锌是一种最经济最有效的防止钢板腐蚀的方法之一。

In addition, there are bond areas between the new and the primary coverage because of the growing up of the plating coat, which may lead to the emergence of micro crack on the coating owing to such causes as too big or uneven impact during plating process, little distortion of global granular zinc dust inside the plating coat, less tight coalescence of the zinc dust flecks.

由于形成镀层的过程处在酸性环境，在镀层增厚过程中不可避免把酸性溶液包裹在镀层里面，酸性溶液会与金属基体和镀层反应，产生氢气，必然会寻找通道选出，形成微气孔；镀层是逐渐形成的，新生镀层与原有镀层之间存在结合面；镀覆过程由于撞击力过大或者不均匀，镀层内部球形颗粒状锌粉变形较小，球形颗粒与球形颗粒的结合不严密等，这些原因会导致镀层产生微裂纹。

A process of alkaline hard chromium plating on aluminum alloy was presented,including oil removal,dipping in heavy metal solution,acid pickling,dipping in zinc solution,hard chromium plating.

1前言铝合金电镀硬铬，是利用强碱性的锌酸盐溶液在置换锌层上直接镀铬，其工艺成熟，操作简便、易行。

It also has a multiple function including the running control, the zincified degree control, the temperature control, the check of trouble, the display and alarm, the data print and so on.

滚镀锌生产流水线采用微型机控制比采用数字程序控制，自动化程度更高；并具有行车运行控制、镀层控制、温度控制、故障检测、显示报警、数据打印等多种功能。

By analyzing and comparing the above test results, the special demands for welding current and time and pressure in the spot welding of zinc-coated steels were put forward.

而在这些产品的装配和制造中，往往会用到电阻点焊方法，由于镀锌钢板表面锌层的熔点很低、硬度也低，给点焊带来一定的困难［1］。

Keywords zinc coating;zinc-coated sheet steel;formability;adhesion

锌层； 镀锌钢板；成形性能；附着特性

It is indicated by analysis that the main causes of difficulty of drawing high strength thick galvanized steel wire are thicker ZnFe alloy coat and higher carbon and manganese contents.

分析大直径高强度镀锌钢丝拉拔困难的主要原因在于锌-铁合金层较厚、钢丝中碳含量和锰含量较高。

The quality of nickel deposit is an important indicator to test the performance of cyanide-free zincating solution for high-Si aluminum alloy.

镀镍层质量是检验无氰高硅铝合金浸锌液性能的重要手段。

The quality of nickel deposit is an important indicator to test the performance of cyanide-free zincating solution fur high-Si aluminum alloy.

镀镍层质量是检验无氰高硅铝合金浸锌液性能的重要手段。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐