Screw galvanization 　　Because the zinc compares with other galvanization with the metal, the price is most inexpensive, and corrosion resistance of the zinc surpasses the steel and iron far in the most sit…

Galvanization 　　The galvanization is refers to, in includes wants the plating ion in the solution, take is plated the material or the goods as the negative pole, through the electrolysis, then obtains coat…

Foreword 　　The metal receives the environment the influence, affiliation chemistry or the electrochemistry responded that creates the destructive violation, is called the corrosion, the nearly all metal product, in certain environment, will have corrosion o…

Fastener theoretical weight computationThe editor's note 86 edition of fastener related national standards no longer include the fastener weight part, according to the fastener profession production operation's need, should the partial fastener manufacturer req…

1. Hot: Arrives at after the steel products either the steel stock heating above frontier point AC3 or the ACM suitable temperature maintains certain time, in the air cools, obtains the pearlyte class organization's heat treatment craft. 2. Annealing annealing…

Now in the world the length Measuring unit mainly has two kinds, one kind is the metric system, the Measuring unit for the rice (m), the centimeter (cm), the millimeter (mm) and so on, in Southeast Asia uses and so on Europe, our country and Japan are many, ano…

Fastener knowledge - surface treatmentSurface treatment type:The surface treatment is forms the overburden layer through certain method in the work piece surface the process, its goal is bestows on by the product surface is artistic, the corrosion preventing ef…