With the use of steel wire more and more widely, the surface treatment of steel wire has become one of the necessary processes. The large roll galvanized wire is a common way of steel wire surface treatment, which can enhance the oxidation resistance and corrosion resistance of the steel wire, so as to improve the service life and use effect of the steel wire. However, some people will worry about whether the large roll of galvanized wire will become brittle after treatment. Here we will elaborate and answer this question in detail.
First of all, we need to know how large rolls of galvanized wire are surface treated. In general, large roll galvanized wire can be divided into hot dip galvanized and electric galvanized two ways, the specific choice of which way, according to different use needs and requirements. Hot-dip galvanizing means that the steel wire is soaked in molten zinc liquid at a temperature of about 450 ° C, and the zinc liquid reacts chemically with the surface of the steel wire to form a layer of zinc alloy compounds. Electrogalvanizing is to soak the steel wire in the electrolyte containing zinc ions, and deposit a layer of zinc metal on the surface of the steel wire through the action of current.
Whether it is hot dip galvanizing or electric galvanizing, the surface of the treated steel wire will form a layer of zinc alloy or zinc metal protective film. This layer of protective film has the characteristics of anti-corrosion, anti-oxidation and anti-corrosion, which can extend the service life and use effect of the steel wire. At the same time, because the liquid state of zinc is different from the solid state of steel, the surface of the treated steel wire will have a certain deformation, thereby increasing the plasticity and toughness of the steel wire, making the steel wire more durable and reliable.
However, in actual use, we can not completely rule out the possibility of large rolls of galvanized wire becoming brittle. This is mainly caused by some factors in the processing process and the role of the external environment. For example, in the process of hot galvanizing, if the temperature or soaking time of the molten zinc solution is not controlled properly, the amount of zinc impregnated on the surface of the steel wire will be too much or too little, which will affect the mechanical properties of the steel wire. In electrogalvanizing, if the chemical composition of the electrolyte is unstable or the temperature is not properly controlled, it will also have an adverse effect on the surface of the steel wire, which may cause thick film hydrogen embrittlement.
In addition, in the process of use, the large roll of galvanized wire will also suffer from some external environmental effects, such as long-term exposure to humid, acidic, alkaline and other environments, will also lead to corrosion, erosion or failure of the zinc layer on the surface of the steel wire, which will affect the service life and use effect of the steel wire.
Post time: 17-04-24