Electric arc ion plating conductive corrosion resistant coating industry technology and equipment
1.Fuel cell bipolar plate conductive corrosion resistant coating
Cost and lifetime are the main bottlenecks that limit the large-scale commercialization of fuel cells. Among them, bipolar plates are one of the important components of fuel cells, and the cost accounts for 40%-50% of the overall fuel cells, which severely restricts the large-scale application of fuel cells. Stainless steel bipolar plates have advantages in terms of cost and processing and forming, but their easy corrosion characteristics seriously affect the conductivity and durability of fuel cells. For China's major needs in hydrogen energy new energy vehicle technology, Liaoning Energy Materials and Devices Key Laboratory focuses on the development of materials, processes and equipment for the modification of fuel cell bipolar plates with special conductive and corrosion-resistant precision coatings, using pulsed bias arc ion plating technology to coat carbon chromium nanocomposite films for surface modification of stainless steel bipolar plates, its performance indicators in conductivity, corrosion resistance and hydrophobicity have reached international Leading level, the laboratory in order to improve the overall quality of the coating yield, has developed to meet the annual output of tens of thousands of processing needs of the production line, the capacity of: 1 furnace every 1.5 hours; each furnace double-sided plating 40 pieces, single-sided plating 80 pieces; 400-500 pieces per day, more than 10,000 pieces per month continuous production capacity. It plays a key technical support role for the independent innovation of the whole process from originality to industrialization of China's hydrogen energy new energy vehicles.
2. High corrosion resistance and strong heat dissipation coating technology
Efficient heat dissipation and salt spray corrosion resistance are the core problems faced in the fields of electronic information, aerospace, and safety energy storage. Aluminum alloy has become the best shell material for high heat generation rate components because of its excellent physical properties and low cost. However, the radiation heat dissipation ability of aluminum alloy is very poor and cannot meet the engineering heat dissipation demand. In response to the above problem our team designs a double-layer structure coating by arc ion plating technology, using the strong salt spray resistance of titanium alloy, combined with the high thermal conductivity, high radiation rate and super hydrophobic properties of amorphous carbon and nano-metal composite, to transfer the surface heat of high temperature devices into the coating and radiate to the outside world in the form of infrared rays, accelerating the heat exchange between the device and the outside world and reducing the surface and internal temperature of the device, thus achieving The effect of improving the stability and service life of the device has achieved an innovative breakthrough in the field of non-high temperature, radiation cooling theory application, and opened up a new way of radiation cooling for thermal management.
In the application, the actual application of the grid 3 and 2 heat sinks prepared by the coating modification is remarkable, and the temperature rise of CPU is always controlled within 94°C at 100% usage, and the optimal sample can be controlled within 92°C to meet the application requirements. Under the national standard salt spray resistance test standard of 96 h, the surface of the sample does not have any corrosion phenomenon.
The team has made important progress in modified coating materials and preparation process, and can design and process special coating production and processing lines for different sizes of heat sink substrates to achieve mass production and processing of different kinds of high corrosion resistant and strong heat sink coatings to meet the universal heat sink needs faced by various fields.
