New Process for Alternative Plating - Dacromet Technology (2)

Four, Dacromet technology coating process

The purpose of the coating operation is to evenly coat the surface of the steel drum with Dacromet coating. The thickness of the coating should be uniform throughout the steel drum, and the coating thickness is a waste of coating liquid. It also affects the surface quality of the coating, so regardless of the method used for coating, try to evenly distribute the coating liquid on the surface of the workpiece. Dacromet's coating process can be divided into dip-coating drying, spraying, brushing, and other methods according to the coating method. In deciding which method to use, the first thing to consider is whether the coating on the steel drum is functional or decorative. It is also necessary to consider the control of coating thickness, production speed, product shape and required quality. Careful consideration of the above questions will determine which method is best for you.

1, dip coating dry

Parts suitable for small steel drums, such as various drum stoppers, bottom lids, and pick rings, etc., the barrel parts are generally immersed in liquid for ten to twenty seconds in order to fully form the purification membrane for hexavalent chromium and steel substrates; Centrifugal drying should be reversed twice each, each time ten to twenty seconds, for special parts to use the fixture, difficult to throw the parts to use artificial assistance, such as using a rod in the centrifuge basket stir, and speed to Fast, in short, it is necessary to ensure that there are no liquid accumulations, liquids, air bubbles, leaks, etc. on the barrel. Through repeated positive and negative reversal of the liquid and multiple adjustments of the spin-drying speed, the final process parameters are determined according to the actual coating effect.

2, spraying, brushing

It is generally used for bucket body parts for barrels that are difficult to dip and difficult to spin dry. The sprayed coating is uniform, the coating is thick, the bonding strength is poor but the finish is good, the corrosion resistance is strong but the efficiency is low. The construction should pay attention to safety, and the viscosity of the slurry during spraying should be appropriately reduced.

V. Advantages of Dacromet Technology

1, environmental protection issues

For the surface treatment such as electroplating, the use of acids, alkalis, and salts will cause the emission of three wastes to exist. When Dacromet's new coating process is used for surface anti-corrosion, it mainly undergoes degreasing, coating, curing, cooling, and inspection of finished products. The entire process is basically closed. Dacromet is a water-soluble liquid that generates only a small amount of water vapor when it cures, so it does not produce substances harmful to the environment. There are 15,000 electroplating factories in the country. The total number of employees in the industry is more than 500,000. There are more than 5,000 production lines and 2.5 to 300 million square meters of plating area. The annual output value of the electroplating industry is about 10 billion yuan. According to statistics, there are 400 million tons of heavy metal-containing waste water, 5,000 tons of solid waste and 30 million cubic meters of acid gas. If the Dacromet process is used extensively in the electroplating industry, our country's environment will be well protected.

2, safety production problems

Dacromet paint is significantly safer than common solvent-based paints. Solvent fog can easily cause fires and endanger the health of workers. The Dacromet solution is water-soluble and non-combustible. During the coating and curing process of the tub, only a small amount of water vapor is generated, and the operator can wear a mask to protect it. For most liquid coatings, bulky gas masks are required.

3, coating performance issues

Compared with electroplating, Dacromet's corrosion resistance and chemical resistance have obvious advantages. This is mainly due to Dacromet's anti-corrosion coating's controlled self-sacrificial protection of zinc particles, the shielding effect of zinc flakes and chromium compounds, and the formation of a dense oxide film on the metal surface that is not easily corroded to provide long-term protection against metal surfaces. Rust anti-corrosion effect. The anti-corrosion effect of Dacromet Membrane Metal is tens of times higher than that of the traditional process. Anti-corrosion principle: controlled sacrificial anode protection (zinc sheet), purification (chromic acid in the slurry loses crystal water after baking, forms a film on the surface of the barrel, binds zinc and aluminum, thereby improving the anti-corrosion ability), shielding effect . The entire coating is approximately 6 to 10 microns thick, each approximately 0.1 to 0.2 microns thick, approximately 60 to 100 layers of protective film, so Dacromet coating has a major advantage: that is, the surface of the part is not only scratched, but also Does not affect its anti-corrosion properties, because the surface scratches only scratch a few layers, there are tens of layers of protective film. The Dacromet coating is therefore more resistant to corrosion (more than 1000 hours of salt spray on iron-based barrel parts), better chemical resistance, and better resistance to atmospheric corrosion. Its outstanding coating properties make its application more and more extensive.

4, production costs

In general, the most significant cost saving method is to reduce the cost of coating materials. Compared to other coatings, Dacromet coatings are not expensive, and their use is more extensive. The market price of homemade Dacromet paint ranges from 35,000 yuan to 40,000 yuan per ton. If zinc oxide and aluminum flakes are used as imported materials, their cost per ton is about 20,000 yuan. The price is about 20,000 yuan. When the Dacromet coating is applied, it can be automatically coated with a robot and cured continuously in an oven, which results in higher productivity during the run time. The Dacromet coating fully meets automation requirements and therefore can reduce labor costs. Because Dacromet coatings are non-hazardous, waste disposal costs are greatly reduced. Because there is no need for additional air, the curing oven can use lower energy consumption. In addition, the Duquesne coating system has a lower scrap rate (usually less than 2%). This means that you spend less time and money reworking unqualified products.

5, equipment investment

In the early days, Dacromet's production technology was in the hands of a few people. Therefore, the price of Dacromet's production line is indeed high, and SMEs can hardly afford it. With Dacromet's popularity and technological advances, the price of Dacromet equipment has fallen to normal levels. Dacromet equipment is divided into two types: continuous type and intermittent type. The former has a high degree of automaticity and is a preferred model for manufacturers with large quantities of processing. The latter has a relatively large labor intensity in the production process but the investment in equipment. Small, only one-third of the former, its annual processing volume is similar to the former, and it is an ideal model for small and medium-sized enterprises. Because investment is small, investment risk is also small. Under normal circumstances, the investment can be recovered in the year.

6, coating thickness problem

In fact, the thickness of Dacromet coating is very easy to achieve, and the thickness of Dacromet coating is proportional to the solid content of the coating liquid used. For a given coating fluid, the thickness of the coating is predictable and can be changed by the number of coatings applied, and the thickness of the coating is proportional to the salt spray resistance time. The thickness of the coating can be determined according to the customer's requirements, and it is determined whether the coating is applied with a coating or a few coatings.

7, Dacromet coating color

In the past, it was very difficult to obtain Dacromet coatings of different colors. Generally, Dacromet coatings were covered with other colored coatings to solve the problem. Dacromets of different colors are now available.

Above we briefly introduced the situation of Dacromet technology. This is a technology that has developed rapidly in recent years. Presumably in the near future, we will see that this technology is widely used in the drum packaging industry.

SANY Hydraulic Parts

JUHENG can save you a lot on new aftermarket, used and rebuilt Bobcat Hydraulic Pumps and related parts. We offer everything from attachments, final drives, undercarriages, engines, cylinders, cabs, pumps and much more for all makes and models of construction equipment. We have a national reach for all of our customers and provide parts to customers around the globe. To request a quote, simply give us a call or click the Get Quote button below and a parts specialist will reply with a quote in minutes.

We export GENUINE PUMP, OEM PUMP, AFTERMARKET PUMP. We are specialized in OEM PUMP & AFTERMARKET PUMP. We export 95 NATIONS. Please contact us If you need STABLE SUPPLIER.

International shipping via UPS, FedEx, TNT, DHL.

Hydraulic Piston Pump, Duplex Pump, Short-Stroke Pump, Noise/Vibration Reduction, High Self-Priming Ability, Rotational Stability, High Efficiency, High Pressure, Compact Size, Reduction of Overall Length. SANY hydraulic pumps for the machine models listed below are available ex stock or with a short delivery.

SANY Hydraulic Main Pump,SANY Main Hydraulic Pump,SANY Hydraulic Pump,SANY Hydraulic Pump Spare Parts,SANY Hydraulic Main Pump Assembly,SANY Main Pump,SANY Pump,SANY Hydraulic Parts,SANY Excavator Parts

Jining Juheng Hydraulic Machinery Co., Ltd. , https://www.sdjuhengmachine.com