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03-16

How to achieve environmentally friendly chromium-free passivation of aluminum alloys and other metals

In the passivation treatment process of aluminum alloy surface, countless researchers have done in-depth research. At present, the passivation treatment method of chromate is widely used in the market. The passivation effect of this kind of heavy metal passivation process is acceptable, but it has serious environmental pollution, especially the passivation method such as the use of hexavalent chromium passivation agent, which is also very toxic. In view of this situation, research on chromium-free passivation has also been carried out. Now there are chromium-free passivators that have been put into production. Then, how to achieve the environmental protection of aluminum alloy and other metals without chromium passivation?
03-16

Research progress of acrylic emulsion and its application in industrial coatings!

The performance of acrylic emulsion has a great relationship with the structure. Different structural designs provide different performances. Figure 1 shows the common acrylic structural design in current literature reports [3]. Among them, monodisperse is the most common and simplest type. Most acrylic emulsions are of monodisperse type, with simple process, easy-to-control structure, and stable product quality; most of the researches on core-shell structure[4], there are also structures with special functions, such as bimodal structure, blended structure, multi-microdomain structure, multipolar structure, hollow sphere structure [5], polymer-pigment composite structure [6], etc. Under the premise of ensuring good film-forming performance, the structure designed by synthesis can improve certain performance, meet customers' requirements for different performance [7], and expand the performance range and application field of acrylic emulsion.
03-16

From chromate passivation to chromium-free passivation, what kind of advancement has the galvanized passivation technology experienced?

As a surface-covering protective layer, metals often require additional protective measures to ensure that they meet the corrosion resistance requirements in a certain environment. For example, when zinc is used as a metal surface covering layer, it needs to have sufficient thickness to protect the base metal, mainly relying on the sacrificial anode function of the zinc layer and the dense basic zinc carbonate film formed on the zinc surface in the atmosphere and neutral water environment isolation protection.
03-16

Technology sharing丨Chrome-free passivation solution Yuanmoto®L632 formula for aluminum alloy

Aluminum chromium-free passivation solution Yuanmoto®L632 is a chromium-free chemical conversion coating process suitable for aluminum materials, including pure aluminum, aluminum alloys and aluminum die-casting parts; it is composed of silicon-titanium-based main salt and film-forming aids , organic acids, etc., without phosphorus, chromium, lead, cadmium and other heavy metals and other harmful organic substances, safe and environmentally friendly; after treatment, a uniform, dense and nearly transparent film can be formed on the surface of the aluminum material. Excellent anti-corrosion performance, the almost transparent film layer can maintain the glossiness of the aluminum surface for a long time, and avoid the formation of spot rust caused by mold on the surface of the aluminum during long-term storage. Or painted to provide good adhesion. This product is used at room temperature, with low tank concentration, stable performance, high production efficiency and low overall cost.
03-16

What is the progress of new chromium-free passivation technology in the field of electro-galvanizing?

What is the progress of new chromium-free passivation technology in the field of electro-galvanizing? Electroplating is also one of the most commonly used techniques for the corrosion protection of metals. Chromium-free passivation treatment is a chemical technology. It is the process of changing the surface of a metal or coating from an active state to a passivated state by chemical or electrochemical means. So let's take a look at the progress of the new chromium-free passivation technology in the field of electro-galvanizing.
03-16

Wet-coated separators have excellent performance and gradually occupy a dominant position in the industry

The wet-process diaphragm can be divided into a base film and a coated diaphragm. The coated diaphragm is a wet-process diaphragm that is coated on the basis of the base film. The base film is limited by the low melting point of PE and has poor thermal stability. In order to improve the performance of the base film, the coated diaphragm is formed by coating the surface with inorganic materials, heat-resistant polymer materials or a mixture of the two, which can greatly optimize the performance of the diaphragm. Common coating materials include inorganic coating materials such as alumina and boehmite; organic coating materials such as PVDF and aramid fiber; and various composite coating materials.
03-16

What do you know about sheet metal materials and surface treatment processes?

Cold-rolled sheet, grade SPCC. The most basic sheet metal material is widely used. It is used as the base material of other materials and is relatively easy to rust.
03-16

What are the benefits of using aluminum sec-butoxide in zinc coating

Aluminum sec-butoxide, also known as ASB, is a compound that has attracted much attention for its use in the production of zinc coatings. Zinc coatings are used in a wide variety of industries including construction, automotive and electronics due to their excellent corrosion resistance properties. Aluminum sec-butoxide can be used as a crosslinking agent in the production of zinc coatings to improve the properties of the coatings.
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