The development direction and trend of fastener vapor rust prevention technology

In recent years, the anti-rust packaging of foreign threaded fasteners has mainly been based on vapor-phase anti-rust technology. The technological development and status quo of foreign well-known fastener companies, to a certain extent, also indicates the development direction and trend of the domestic fastener industry. This article introduces the development and application of VCI materials at home and abroad, and looks forward to the research direction in this technical field.

Vaporphase inhibitor (Vaporphase inhibitor, VPI for short), also called volatile corrosion inhibitor, or VPI for short, is a kind of vapor phase inhibitor that can automatically volatilize and adsorb on the surface of the metal at room temperature, thereby preventing metal corrosion Anti-corrosion chemicals. Nowadays, the development of threaded fasteners places more emphasis on quality 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. Features of vapor phase rust prevention technology

VCI technology has various practical application forms. According to actual needs, products such as VCI paper, VCI gas foam and VCI powder are more widely used. Its main features are: (1) It can protect against rust without touching the metal threaded fasteners; (2) It has anti-rust protection for all parts of the 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, no special equipment or technology is needed, and the operation efficiency is high; (4) The anti-rust period is longer for 15 years; (5) The surface of threaded fasteners can be kept clean, suitable for modern cleaning Production needs.

2. Development of VCI products (Guide: Hydrogen embrittlement after heat treatment of fasteners)

Based on vapor phase corrosion inhibitor, with or without carrier, it can be made into a variety of vapor phase rust preventive materials. In addition to the traditional VCI powder, VCI tablets and VCI paper, VCI 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. And the discharge of packaging waste 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 anti-rust packaging.

VCI plastic products (films) have evolved from being only applicable to iron and steel metal fasteners to non-ferrous metals and a variety of metal fasteners and assemblies. At present, our 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 Industry Up and Down Fasteners Improve the Value of the Whole Supply Chain'

VCI adhesive tape is also a new type of VCI material. It is a pressure-sensitive adhesive tape with vapor phase rust prevention performance. When pasted to the surface of metal fasteners, it will prevent rust on the surface of metal fasteners, and it can be opened when removed, which is convenient to use. Adding a vapor phase corrosion inhibitor to the packaging box and the package during packaging can make the vapor phase anti-corrosion adhesive tape have both the vapor phase anti-rust performance and the contact anti-rust performance. Outdoors, it has the characteristics of resistance to rain and oil.

More related hardware stamping technology industry news: