VpCI rust prevention is a science of corrosion protection by using vapor phase inhibitor technology. At room temperature for vapor phase corrosion inhibitors slow the gasification of volatile corrosion of vapor adsorption on bare metal surface, the stability of two molecules to form a thick protective film,which can effectively prevent the oxygen and moisture environment atmosphere on the corrosion of metals, due to the vapor phase inhibitor sustainable volatilization, remain the state of "saturation" in confined Spaces, Therefore, it can achieve long-term, stable and excellent anti-corrosion effect. Compared with the traditional anti-corrosion method, the vapor phase anti-corrosion has many incomparable advantages. First of all, the use of RP oil coating, cleaning, tedious steps, and the use of vapor phase rust is eliminated these tedious links, convenient and simple operation; Secondly, because the corrosion inhibitor molecule is gas state, all-pervasive, so it can penetrate into the corner of the traditional RP oil is difficult to cover, to achieve the role of anti-rust; Third, the effective composition of the vapor phase corrosion inhibitor molecule has a long retention time, which can achieve more than 10 years of preservation.