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Quality Inspection Standards
Jun 11, 2018

Quality request of excellent grade galvanizing plate includes dimensions, surface, amount of galvanizing, chemical composition, shape, machine function and packaging.
1. Packaging
It is divided into two types: a galvanized plate with a fixed measure length and a galvanized plate with a roll. General tin packaging, lined with damp-proof paper, outside the iron waist tied, tied firmly to prevent internal galvanized plate friction with each other.
2. Size
The scale thickness, length and width of the galvanized plate and its tolerances are specified in the product scale(as described below and below). In addition, the width and length of the board and the width of the volume can also be determined according to the user's request.
3. Surface
General situation: Because of the difference in the disposal method in the plating process, the general situation is also different, such as the general situation of ordinary zinc flowers, fine zinc flowers, flat zinc flowers, zinc flowers and phosphorization disposal. The zinc plating plate and the galvanized roll plate cut into a fixed measure length shall not have the disadvantages that affect the use(as shown below), but the roll plate allows how many non-abnormal sections such as welding sites are allowed.

4. Zinc plating
Scale value of galvanizing: The amount of galvanizing is a widely adopted method that implies the thickness of the galvanized plate. There are two types of galvanization(ie, equal thickness galvanization) and two types of galvanization(ie, difference thickness galvanization). The unit of galvanization is g/m2.
5. Machine function
(1) tensile test: In general, as long as the layout, stretching and deep stretching of the galvanized plate has a tensile function request.
(2) Bending experiment: It is an important name for weighing the process function of thin plates. However, the request for various types of galvanized plates on the national scale is not the same. After the galvanized plate is generally requested to bend 180 O, the outer profile must not leave the zinc layer, and the plate base must not be cracked and broken.
6. Chemical composition
The request for the chemical composition of galvanized substrate is divided on the national scale. If Japan does not request, the United States does. It is generally not used for product inspection.
7. Plate
There are two goals for weighing the shape of black and white, namely flatness and sickle bending. The flatness of the plate and the maximum allowable value scale of the sickle bend are bound to be delimited.