Metal blackening at normal low temperature is characterized by energy saving, high efficiency, simple equipment, convenient operation and basically no environmental pollution. From small pieces to large, complex and different shapes Metal work Can be applied. However, due to the difficulty of pretreatment, all kinds of blackening agents have different disadvantages, and the promotion of this technology is unbalanced. According to the technology of Zhubao Combined with years of production practice, this paper discusses the process control and improvement measures in production application for reference by peers.
What is the reason why there is no coloring or partial coloring at room temperature?
① Due to poor pre-treatment, there is oil stain on the surface of the part, which affects the formation of the blackening film. The part can be degreased again, and then put into the blackening groove to continue blackening.
② The parts overlap each other and should be turned over in time.
③ If the solution content is too low or the proportion is too low, the original solution can be supplemented after analysis and adjustment. If necessary, the solution can be replaced.
★ Scope of application:
Solid black is Special surface treatment agent for metal materials, suitable for the surface treatment process of carbon steel, cast iron, alloy, aluminum, copper and other metals, widely used in machinery, power, chemical, automobile, * * *, instrumentation, stationery, home appliances and other fields Standard parts major Parts, springs, etc Blackening process; Can also be used for metals Process products And other special fields.
★ Usage:
The firm black hair and black liquor can be directly brushed or soaked, The blackening time depends on the uniformity of the black film on the workpiece surface It depends 。 When soaking Solid Black Dilution 2-4 times, soak 1-5 The blackening effect and speed can be improved by spraying or intermittently shaking the workpiece. commonly one Kg solid black can handle about 20 square meters or 200-300 kilograms of material. The workpiece after solid black treatment should be placed 1-2 first Minutes, water wash After two times, rust shield type 3, rust shield type 4 and rust shield type 5 can be used to increase brightness and rust prevention according to different process requirements. If the oil stain or rust layer is heavy, the solid black can be used ® Before, use our company's grease free net to degrease or rust without trace ® Rust removal. Solid black A1 and A2 are suitable for blackening of ferrous metals such as carbon steel and cast iron; Solid black B1 is suitable for copper blackening process; Solid Black ® C1 type is applicable to aluminum and aluminum alloy blackening process.
Zhubao Blackening liquid The company's metal room temperature blackening agent should be prepared as often as possible, as little as possible, and as much as needed, because during blackening treatment, iron ions dissolved in the solution will continue to react with effective substances in the tank solution. It is also necessary to timely check whether the working bath liquid is polluted. The aging workpiece liquid should be regularly filtered or renewed. The blackening of large section workpieces in the working liquid with high concentration will also produce spots. When the blackened working liquid is stirred unevenly or the surface of the workpieces is heated unevenly, and there is dirt on the surface of the workpieces to be removed, the spots will be produced. The sealant can be soaked through the above three post-treatment methods, It can effectively improve the blackening effect of the workpiece. The blackening agent * * specially reminds the operator that the workpiece should be dried for a few minutes after post-treatment, and then treated again. The blackening agent * * passes two thousand and nineteen In the new year, a brand new product of blackening agent was launched, which has been continuously innovated and improved in Very big break. The blackened parts shall be cleaned repeatedly with clean water, otherwise the corrosion resistance of blackened film will decline.
The metal room temperature blackening agent needs to be operated step by step, so that the workpiece can achieve a better blackening effect. The thin antirust oil, antirust lubricating oil, etc., thin antirust oil: thin antirust oil, which has been applied in production through various processes of most fastener enterprises, proves to have good antirust performance for fastener products. At the same time, it is easy to apply, bright in color, and less volatile in solvent, The consumption is less than one third of the thick rust preventive oil, so the production cost is saved by more than two thirds. And it must be filtered and removed in time, otherwise the black liquor will become invalid due to autocatalysis. Even if the double tank alternative slag removal and alternative use are used in actual production, it will inevitably bring inconvenience to the production, making the production process complex and affecting the black quality. Moreover, the discharged slag often pollutes the environment, the black time is too short, the black film is rough and loose, and it will fall off at a touch, even in the automated production line, It is also difficult to apply it to actual production, let alone batch production. It has been greatly improved, with firm adhesion and strong corrosion resistance.
