Who knows, why the galvanized layer of mechanical galvanizing is very thin and does not meet the req

Mechanical galvanizing is a kind of anti-corrosion coating with electro-galvanizing, hot-dip galvanized iron, and Dacromet treatment with different processes, and its process characteristics are: production and operation at room temperature, and the formation of the coating layer does not belong to electrodeposition, but is the rotation of the plating cylinder of the loading parts, so that the parts in the cylinder collide with each other, and realize the mechanical industry energy transfer to form the coating.

If the thickness of the zinc layer is not enough and does not meet the requirements, you can use zinc-rich paint with high zinc content to overcoat and increase the thickness of the zinc layer of the accessories, so as to meet the requirements.

Does the mechanical galvanizing referred to by lz use zinc balls to deposit on the plated metal by physical impact? This method does not get too thick plating, and the plating is uneven, but it also depends on the thickness requirements of lz, if the processing time is long, the thickness of the plating will come up, and the same is true for water plating, plating for one day, I don't believe that it can't be on the millimeter.

However, compared to the thickness of hot-dip galvanizing, a few millimeters is not a problem.

Hope that helps.

There are generally two types of galvanizing: cold plating (electroplating) and hot plating.

1.The mechanical parts are generally cold plated, and the thickness of the existing galvanizing plant will not be exceeded.

2.The stent structure is generally hot-dip galvanized, and the hot-dip galvanized coating will be uneven. For example, the high-voltage power tower is hot-dip galvanized.

Adjust the galvanizing process, the thickness of hot-dip galvanizing can generally reach above, and the thickness of electro-galvanizing is nearby.

The quality of the galvanizing is related to many factors: the quality of the zinc ingot (purity of zinc, the content of other elements, etc.), the temperature of the zinc bath, the dipping time, the chemical composition of the base steel (silicon, sulfur and other inactive elements) and the quality of the surface and imitation surface, pre-plating treatment, post-plating treatment, etc. Among them, the process indicators such as zinc bath temperature and dipping time are the key to the quality of galvanizing (thickness, uniformity, adhesion).

Generally, in order to achieve a bright surface color, it is necessary to make the zinc bath slightly cooler and immersion for a longer time, which is another consequence of which is that the adhesion of the zinc layer is reduced. Although it is beautiful, from the perspective of anti-corrosion, the reduction of adhesion makes the slight abrasion and liquid damage of the guardrail in the process of storage, transportation and construction also damage the zinc layer, which is more than worth the loss. China's hot-dip galvanizing standard only stipulates that the surface color of the zinc layer is consistent, and the surface color is required to be bright for the sake of aesthetics, which is not only unscientific and economical, but also has no theoretical basis.

I hope my answer is helpful to you, and finally I wish you good health and a happy mood again!

1.The adhesion of the galvanized layer itself to the base metal is poor, resulting in cracking and peeling of the galvanized layer (related to the composition of the plating solution and the thickness of the plating layer). 2.

Gas is mixed into the zinc coating, which expands when the coating is baked, causing the coating to peel off. 3.The hot-dip galvanized sheet has a thick coating layer and coarse coating grains, so that the surface roughness is too large after molding and too much zinc powder adheres to the surface of the parts, which interferes with the normal formation of the phosphate film.

4.Because of the dissolution of Al in the galvanized sheet coating, Al3+ accumulates in the phosphating tank with caution, which makes the phosphate film crystallize coarsely. 5.

The surface of the passivation film is too smooth or there are oil stains and water stains that affect the adhesion. 6.Zinc metal is highly active and reactive, which reduces the viscosity of the coating.

7.The secondary product of zinc (alkaline double salt) is easily soluble in water, and most of them are alkaline, and during use, the water passing through the coating dissolves with the salt width on the substrate, destroying the adhesion of the coating coating. 8.

The corrosion products (white rust Zn (OH255%·ZNCO340%·H2O5%) produced by zinc due to various reasons (such as microbattery action) make the volume expand (increase dozens of times), which affects the adhesion of the coating coating. 9.Zinc is relatively stable within the pH of 9 11, and if the pH of the water or water-soluble sparrow liquid through the coating is not within this range, the zinc will be dissolved and resolved, which will affect the adhesion of the coating coating.

10.Zinc reacts with fatty acids present in or in paints (certain types of oil-based paints) to produce water-soluble metal soaps (resin metal salts), which are often the cause of embrittlement or even peeling of coatings.

Summary. Hello, dear <>

We're happy to answer for you! No, because some materials may be coated with a layer of zinc-like metal, which makes it look like it's galvanized, but it's not. To determine if a material is galvanized, more testing and analysis is required.

Whether the thickness of the galvanized layer can determine whether it is a galvanized material.

Hello, dear <>

We're happy to answer for you! No, because some materials may be coated with a layer of zinc-like bent metal on the surface, which will make it appear to be galvanized, but it is not. To determine whether a material is galvanized or not, more testing and analysis is required.

Cold galvanized material, check the galvanized layer to show whether it is galvanized material.

Hello, pro yes pro The thickness of the galvanized layer detected means that there is a layer of galvanizing on the cold galvanized material. Normally, the thickness of the galvanized layer of cold galvanized materials is between 5-25um. Therefore, the thickness of the galvanized layer is in line with the common range of cold galvanized materials, and the material can be considered to be galvanized.

Galvanizing can be divided into hot (dip) galvanizing and cold (electrolytic) galvanizing, usually electrogalvanized layer thickness 5 15 m, while hot-dip galvanizing.

Layers are generally more than 65 m and even as high as 100 m.

1. Principle of galvanizing:

Since zinc does not change easily in dry air, whereas in moist air, the surface can.

This produces a very dense basic zinc carbonate film that effectively protects the interior from corrosion. And when for some reason, the plating is damaged and the steel base is not too large, the zinc forms a microbattery with the steel matrix, so that the steel matrix becomes a cathode and is protected.

2. Performance characteristics:

1. The zinc coating is thick, the crystallization is fine, uniform and porous, and the corrosion resistance is good;

2. The zinc layer obtained by electroplating is pure, and the corrosion is slow in acid, alkali and other fogs, which can effectively protect the steel matrix;

3. Zinc plating is made of chromic acid.

After passivation, it forms white, colored, army green, etc., which is beautiful and generous, and has a certain degree of decoration; 4. Because the zinc coating has good ductility.

Therefore, it can be used for various moldings such as cold stamping, rolling, and bending without damaging the plating.

If it is electroplating, the thickness of the coating is generally very small, unless there are special requirements, it should generally be about 15 microns, unless it is precision designed, and the influence of the galvanized layer on the size is generally not considered. But the hot-dip galvanized layer is very thick, and it generally needs to be considered!

After mechanical galvanizing, the size is generally increased by a few microns, but there is no need to consider it.

Galvanizing can be divided into hot (dip) galvanizing and cold (electrolytic) galvanizing, usually the thickness of the electro-galvanized layer is 5 15 m, while the hot-dip galvanizing layer is generally more than 65 m, or even as high as 100 m. Hot-dip galvanizing hot-dip galvanizing covering can hot-dip galvanizing has good power, dense coating, and no organic inclusions.

It depends on how thick you plate! Generally tens to hundreds of miao.