How to solve the mildew of hot dip galvanized products??????

The purpose of hot-dip galvanizing is mainly used to prevent steel rust and prolong the service life of steel parts. As long as the environment you store in is not strongly corrosive gas, there is generally no need for replating. GB T13912-2002 national standard stipulates that "galvanized products stored in a humid environment are allowed to have white rust, which is mainly present in basic zinc chloride components", which is not enough to destroy the galvanized layer, does not affect the normal use of the product, and should not be used as a reason for unqualified rejection.

There are many ways to deal with this situation, the easiest of which is to dilute it with edible white vinegar with appropriate water and scrub it with a towel. If you think about it purely from an aesthetic point of view, you can use "hot-dip galvanized special repair paint" to spray it. It mainly depends on the standard of Party A's acceptance and is for reference only.

Medium zinc hot-dip plating. Shen Jianfu.

Which can only be sprayed with galvanized paint.

Is there a lot of mold? Not much, you can repair it with that self-spraying zinc from Li Lacquerer.

Hot-dip galvanizing has missing plating or defects, and is generally repaired by spraying or brushing cold galvanizing. Before operation, ensure that there is no oil stain and impurities on the surface, and the zinc content of the cold galvanized coating can reach 96%, and the anti-rust effect of hot-dip galvanizing can be achieved, and the film thickness that needs to be increased is determined according to the actual situation. The cold galvanized paint has a high zinc content and mainly plays the role of rust prevention, and finally the surface is sprayed with a galvanized colorant, and the color is close to that of hot-dip galvanizing, so that the purpose of repair is achieved from both the anti-rust effect and the color.

Della Repair Paint Repair.

First, the weather is humid; second, the density of the coating is not enough; Thirdly, there are organic residues such as phosphorus and sulfur in the sealing agent from the passivation solution or light agent on the workpiece. Moldiness is the same as the mechanism of moldy vegetables in your house, that is, bacteria breed under certain conditions.

The coating is not dense, which may be due to the electroplating process, or it may be that the pre-treatment is not in place.

The early product was not cleaned, resulting in mildew when it was oxidized twice.

People who know the galvanized steel strip industry will know that galvanized steel strip will be moldy and rusty during storage, and reasonable storage can reduce the mildew of galvanized steel strip. When the galvanized steel strip is stored, if it is not treated, it is easy to oxidize with the air, because the air is humid, and it will rust over time.

First of all, the appearance of galvanized steel strip should be treated, the appearance of galvanized steel strip is not clean, and the appearance will be oxidized in a certain environment. Zinc oxidizes in the air, giving it a white rust appearance, which is common and normal.

Secondly, it is necessary to see whether the galvanized steel strip is hot-dip galvanized or electro-galvanized, if it is hot-dip galvanized in a clothing design school, because the zinc layer is relatively thick, the generation of white rust does not affect the normal use, because the oxidation rate of zinc in the air is very slow. If it is electrogalvanized, it needs to be treated in time, and if there is oxidation and rust, it should be treated in time.

Summary. Hello, I'm glad that your problem can't be solved, but it can only be prevented from mildew for a long time, maybe the ambient humidity is too much, you can consider coating the heat sink to prevent mildew.

You search for a good match, I'm glad that your problem can't be solved, you can only keep it mildew for a long time, maybe the ambient humidity is too much, you can consider coating the heat sink and fingers to prevent mildew leakage.

My balance is casting, I suspect that the galvanized time is empty and waiting for sulfuric acid, moisture or something is not easy to deal with this celery, I put it in the oven, bake the moisture, how about it. Does heating have any effect on zinc plating?

Do not put inside the oven.

There is heating has an effect.

When the temperature reaches a certain point, the situation is different.

And it can't be controlled in time.

I suspect there's too much moisture in it, so what to do.

Is it okay to control it at about 80 degrees?

OK. But not too long.

How long is appropriate, and what will happen if it is long.

A few minutes. How has it been for a long time. Thank you.

It won't be good.

What does heat sink coating mean? Thank you.

What is the cause of mold in galvanized products Hello, dear, 1The weather is humid; 2.The density of the coating is not enough; 3.

There are good residues on the workpiece from the passivation solution or light agent, and the most likely is that there are some organic residues containing phosphorus and sulfur in the sealing agent. I hope I can help you with Zhihuai, if my answer is helpful to you, please also give a like (comment in the lower left corner), look forward to your like, your efforts are very important to me, and your support is also the driving force for my progress. Finally, I wish you good health and a good mood!

Hello, the reasons for mold in galvanized products may be the following:1The quality of the galvanized layer is not good:

If the quality of the galvanized layer is not good, it will lead to uneven or defective zinc layer on the surface of the product, which will make the surface of the product easy to absorb moisture and microorganisms in the air, which can lead to mold of the product. 2.Poor storage environment:

If galvanized products are stored in a humid, poorly ventilated environment, they are susceptible to airborne moisture and microbial invasion, which can lead to mold and mildew of the product. 3.The surface slag of galvanized products is resistant to closed pollution

If there are contaminants on the surface of galvanized products, such as grease and dust, these contaminants can absorb moisture and microorganisms, which can lead to mold and mildew. In order to avoid mold of galvanized products, we can start from the following aspects:1

Choose the best galvanized products to ensure that the galvanized layer on its surface is uniform and complete. 2.When storing galvanized products, it is necessary to choose a dry and good environment to avoid moisture in the product.

3.Before using galvanized products, clean the surface of contaminants to ensure that the surface is dry and clean. In addition to this, we can also regularly clean and pre-corrosive galvanized products to prolong their service life.

Summary. Because there are corrosives left on the surface of the workpiece, these corrosives will affect its performance, resulting in the generation of mildew, and then the indoor air temperature is too high will also affect its performance, and the finished product must not be put into storage when it is not completely dried, otherwise it will also cause mold on the surface of the galvanized steel strip when used.

Because there are corrosives left on the surface of the workpiece, these corrosives will affect its properties, resulting in the generation of mildew, and then there is that the indoor air temperature is too high before the search will also affect its performance, and the finished product must not be put into storage when it is not completely dried, otherwise it will also cause mold on the surface of the galvanized steel strip when used.

Precautions for galvanized products Galvanized steel (such as galvanized angle steel, galvanized channel steel, galvanized flat steel, galvanized round steel) transportation requirements vehicles encounter rainy weather need to cover the whole process of the rain cloth, in case of rain, should be disassembled and dried in time after unloading, so that the rainwater evaporates as soon as possible and dries. When the galvanized steel is stored, sleepers should be placed at the bottom to ensure a proper distance from the ground to prevent the bottom from being damp or corroded, and the tightly packed plated steel should be kept dry and ventilated when stored indoors; When stored outdoors, it should be covered with a tarpaulin or take other measures to prevent rain, such as being exposed to rain or soaked in rain, it should be opened and dried as soon as possible.

Summary. Hello, the cause of mold in galvanized products is uneven plating.

Hello, the cause of mold in galvanized products is uneven plating.

The plating is uneven, there is leakage plating, or the surface is damaged during the transportation process or the use and installation process, 3 months have embroidery can only mean that there is no plating, hot-dip galvanizing if not passivation treatment, in the open air for three months by oxygen, moisture and dust impurities in the air will definitely rust. If the passivation treatment is carried out, it should not be rusted if it is not placed in an open environment with an acidic corrosive atmosphere. Hot-dip galvanized passivation has a long service life in the outdoors, up to several years or even more than ten years.

Galvanizing is an antiseptic treatment in which an iron product is soaked in molten zinc to form a layer of zinc. This zinc layer protects the service life of the iron product by preventing oxidation and corrosion of the iron hall.

If the galvanized product is moldy, there may be several reasons for the leakage:

1.The galvanized layer is of poor quality and has defects. If the zinc layer has defects such as scratches and cracks, it will make the surface of the product lose its protective effect, resulting in rust and mold.

2.The surface of the product is damp. If the galvanized product is exposed to humidity for a long time, it will cause the oxidation reaction of the iron material under the galvanized layer, resulting in rust and mildew on the surface of the iron material.

3.There are too many microorganisms in the environment. If the galvanized product is exposed to microbial growth for a long time, microorganisms will invade the surface of the product and grow and multiply, resulting in mold on the surface of the product.

For the causes of mold in galvanized products, it can be prevented by the following methods:

1.Select the best galvanized products, and strictly control the production process of the product to ensure the quality of the galvanized layer.

2.Avoid leaving the product in a humid environment for a long time as much as possible and keep the surface of the product dry.

3.Wash and disinfect the product regularly to reduce the potential for microbial growth.