In recent years, the anti-rust packaging of foreign threaded fasteners is mainly based on the gas phase anti-rust technology. The technological development and status quo of well-known foreign fastener companies also indicate the development direction and trend of the domestic fastener industry to a certain extent. This paper introduces the development and application of gas-phase anti-rust materials at home and abroad, and looks forward to the research direction in this technical field.
Vaporphase inhibitor (VPI for short), also known as volatile corrosion inhibitor, gas phase rust inhibitor for short, is an anti-corrosion chemical that can automatically volatilize gas and adsorb on the surface of metal at room temperature, thereby preventing metal corrosion. Taste. Today, the development of threaded fasteners puts more emphasis on quality than in the past. How to solve the rust problem of metal threaded fasteners from production to assembly has also received more and more attention.
1. Characteristics of gas phase rust prevention technology
There are various practical application forms of gas phase anti-rust technology. According to the needs of actual use, the most widely used products are gas-phase anti-rust paper, gas-phase anti-rust foam, gas-phase anti-rust powder and other products. Its main features are: (1) It does not need to be in contact with metal threaded fasteners to protect against rust; (2) It has anti-rust protection for all parts of exposed metal fasteners in the entire packaging space, and the anti-rust effect is not affected. The influence of size and shape; (3) The packaging and unpacking process is simple and easy to operate, no special equipment or technology is required, and the operation efficiency is high; (4) The anti-rust period is 1-5 years; (5) The surface of threaded fasteners can be kept clean, suitable for The need for modern cleaner production.
2. Development of vapor-phase anti-rust products
Based on vapor phase corrosion inhibitor, with or without carrier, various vapor phase rust preventive materials can be made. In addition to the traditional vapor-phase anti-rust powder, vapor-phase anti-rust tablet and vapor-phase anti-rust paper, vapor-phase anti-rust plastic products are also a newer anti-rust packaging material suitable for threaded fasteners, which can simplify the packaging process and reduce the amount of packaging materials. It can also maintain the air tightness and transparency of plastic products, and directly identify the specifications and models of fastener products to meet the requirements of beautifying and rust-proof packaging.
Vapor-phase anti-rust plastic products (films) are only applicable to iron and steel metal fasteners at first, but are also applicable to non-ferrous metals and various metal fasteners and assemblies. At present, my country is in the stage of expanding research and development and batch trial, the product quality is not stable yet, but the development prospect is relatively broad. "Related News: Linking Fasteners Up and Down the Industry to Improve the Value of the Whole Supply Chain"
Vapor phase anti-rust adhesive tape is also a new type of vapor-phase anti-rust material. It is a pressure-sensitive adhesive tape with vapor phase rust properties. When pasted to the surface of metal fasteners, it has a rust-proof effect on the surface of metal fasteners, and can be pulled apart when removed, which is convenient to use. Adding a vapor phase corrosion inhibitor to the packing box and package during packaging can make the vapor phase rust preventive adhesive tape have both vapor phase rust preventive properties and contact rust preventive properties. Outdoors, it is resistant to rain and oil.