How to distinguish electroplated and hot-plated pipe fittings

Process difference:

Cold galvanizing, also known as electric galvanizing, is the use of electrolytic equipment to remove oil, pickling the workpiece into

the composition of zinc salt solution, and connected to the negative electrode of the electrolytic equipment; A zinc plate is placed

on the opposite side of the workpiece and connected to the positive electrode of the electrolytic device, the power supply is switched

on, and a layer of zinc is deposited on the workpiece by the directional movement of the current from the positive electrode to the

negative electrode.

Hot dip galvanizing is to remove oil from the workpiece, pickling, dipping, drying after dipping into the dissolved zinc liquid for a

certain time, can be brought out.

Differences in appearance:

The appearance of cold galvanized is smooth and bright, and the electroplating using color passivation process is also yellow-green

as the main color, which is colorful. The coating with white passivation process is bluish white or white is green, and the coating with

white passivation process is slightly colorful at a certain Angle with the sunlight. In the corner of the complex workpiece, it is easy to

produce "electric burning" and gray, and the zinc layer in this part is thicker. It is easy to form a dead current Angle in the negative

corner, resulting in an undercurrent gray area, where the zinc layer is thin. The whole workpiece has no zinc nodules, caking and other

phenomena.

The appearance of hot-dip galvanizing is slightly rougher than that of cold galvanizing, silver-white, and the appearance is easy to

produce process water marks and a little drip, especially at one end of the workpiece. However, the zinc layer of hot-dip galvanizing

is dozens of times thicker than that of cold galvanizing, and the corrosion resistance is dozens of times that of cold galvanizing.