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In recent years, the anti-rust packaging of foreign threaded fasteners is mainly based on gas phase anti-rust technology. The technical development and current situation of foreign well-known fastener companies also indicates the development direction and trend of domestic fastener industry to a certain extent. This paper introduces the development and application of vapor phase antirust materials at home and abroad, and looks forward to the research direction in this technical field.

Gas phase corrosion inhibitor (Vaporphaseinhibitor, referred to as VPI), also known as volatile corrosion inhibitor, referred to as gas phase rust inhibitor, is a kind of at room temperature can automatically volatilize gas adsorption on the surface of the metal, so as to prevent metal corrosion of anti-corrosion chemicals. Nowadays, the development of threaded fasteners emphasizes quality more than in the past. How to solve the problem of rust prevention in the process of metal threaded fasteners from production to assembly has also received more and more attention.

1. Characteristics of gas phase anti-rust technology

The practical application of gas phase anti-rust technology is various, according to the needs of actual use, the application is more gas phase anti-rust paper, gas phase anti-rust gas foam, gas phase anti-rust powder and other products. Its main features are: ⑴ It can play a role of rust protection without contacting with metal threaded fasteners; ⑵ It has anti-rust protection effect on all parts of bare metal fasteners in the whole packaging space, and the anti-rust effect is not affected by size and shape. ⑶ packaging and unpacking process is simple and easy, no special equipment or technology is required, and the operation efficiency is high. ⑷ The rust prevention period is longer for 1-5 years; (5) The surface of threaded fasteners can be kept clean, suitable for modern clean production needs.

2. Development of gas phase anti-rust products

Vapor phase corrosion inhibitor as a basis, with or without the use of carriers, can be made into a variety of vapor phase rust-proof materials. In addition to the traditional gas phase antirust powder, gas phase antirust tablets and gas phase antirust paper, gas phase antirust plastic products are also a relatively new antirust packaging material suitable for threaded fasteners, which can simplify the packaging process, reduce the amount of packaging materials and the discharge of packaging wastes, 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 antirust packaging.

Gas phase antirust plastic products (film) from the initial only for steel metal fasteners, the development of non-ferrous metals and a variety of metal fasteners, assemblies can be applied. At present, China is in the stage of expanding development and batch trial, the product quality is not stable, but the development prospect is broad. Related News: Linking Fasteners Up and Down the Industry to Increase the Value of the Entire Supply Chain

Gas phase antirust adhesive tape is also a new type of gas phase antirust material. It is a pressure-sensitive adhesive tape having a vapor-phase rust preventive property. When pasted on the surface of the metal fastener, it can prevent rust on the surface of the metal fastener, and can be pulled apart when removed, which is convenient to use. The gas phase corrosion inhibitor is added to the packaging box and packaging at the time of packaging, so that the gas phase anti-rust adhesive tape has both gas phase anti-rust performance and contact anti-rust performance. In the outdoors, it has the characteristics of rain resistance and oil resistance.