Evaporation coater with PECVD transparent protective coating system
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Car headlight is a familiar automobile part frequently used in our everyday life. It is able to reflect converged light given off from a bulb to one hundred meters away by the high reflectivity of headlight shade. Currently, 95% of headlight shades are aluminized by vacuum metallizing machines. However, the vacuum aluminizing process has fatal weakness, i.e. the oxidation. Here we also take headlight shade as example that aluminized layer on it is easy to get oxidated and as time goes on the surface of headlight shade will become yellow and turn dark, gravely tampering with its reflectivity. Contemporarily, many factories solve this problem by the process of transparent varnishing spraying as protective top coating after aluminizing coating. But by the technology of transparent varnishing there have following problems:
First, spraying machines and varnish material are costly in production;
Second, operation cost is much dear as highly purified workshop required and constant temperature and constant humidity system plus spraying machines consume substantial electricity;
Third, as aluminized substrate headlight shades should be taken out of vacuum metalizing chamber and shifted to varnishing spraying process, the contamination should be happened inevitably by dusty adhesion and substandard products are increased;
Fourth, as the issue of environmental protection is vitally important in our world, the varnishing process causes unavoidably pollution to nature, so it is an obstacle to export the products into world market.
China Guangdong PVD Metallizer Co. has successfully solved the problems by the technology of twice coating completed simultaneously, i.e. aluminizing as base coating and silicon oxide deposition as top coating are achieved in one coating cycle without taking substrate products out of the metalizing chamber. It is the company innovation that the evaporation coaters are equipped with silicon oxide deposition system of the technology of plasma enhanced chemical vapor deposition.
The process is that after aluminization coating, the machine starts to gasify silicon oxide material by gas inflating with constant speed into the chamber under control of MFC and the gas ionized by plasma discharge between electrode panels is deposited on the surface of substrate products forming highly-dense, transparent protective film with characteristics of good chemical stability, excellent adhesion, resistance to alkali, acid fastness without any pollution to nature.
So the evaporation coaters with transparent protective coating system are extensively used in many industries in plastic, glass making, hardware, etc. to meet various industrial demands.
China Guangdong PVD Metallizer Co.
Alex Li
Tel: +86 758 2279559
Fax:+86
Mobile:+86 13929890858
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Skype: vacuum-metallizer
Website: http://
Address: No.1 duanzhou road, Zhaoqing, China
Please click below to see videos of our metalizing machines:
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Galvanized steel can be classified into two main types: hot-dip galvanized steel and electro-galvanized steel.
Hot-dip galvanization is the most common method of galvanizing steel. In this process, the steel is first cleaned and then immersed in a bath of molten zinc at a temperature of around 450°C. The zinc reacts with the surface of the steel, forming a series of zinc-iron alloy layers that provide excellent corrosion protection.
Electro-galvanization, on the other hand, is a process that involves using an electric current to deposit a thin layer of zinc onto the steel surface. This method is typically used for thinner gauge steel and provides a smoother finish than hot-dip galvanization. However, it may not be as durable as hot-dip galvanization and is typically used for less demanding applications.
In addition to its corrosion resistance, galvanized steel is also fire-resistant and has good thermal conductivity. It is also relatively easy to fabricate and can be formed into a wide range of shapes and sizes, making it a versatile material for various applications.
However, galvanized steel may not be suitablefor all applications. It has a shorter lifespan than some other corrosion-resistant materials, such as stainless steel, and may require regular maintenance to ensure its continued protection against corrosion. Additionally, galvanization can affect the appearance of the steel, giving it a characteristic dull gray or silver color that may not be desirable for some aesthetic applications.
Another consideration with galvanized steel is the potential environmental impact of the galvanizing process. The production of galvanized steel typically involves the use of large amounts of energy and resources, and the disposal of waste products from the galvanizing process can have environmental implications. However, efforts are being made to improve the sustainability of the galvanizing process, such as through the use of more energy-efficient production methods and the recycling of waste materials.
Overall, galvanized steel is a popular and versatile material that offers excellent corrosion resistance and durability. Its use is widespread in a variety of industries and applications, and it will likely continue to be an important material for many years to come.
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Wuxi Shengshu Metal Co., Ltd. , https://www.wuxissmetal.com