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Thin organic films on metal surfaces can be obtained by adsorption of volatile (vaporphase) inhibitors (VCI), which, despite the extremely small thickness, provide high corrosion resistance under various atmospheric conditions. However, there is a problem in the practical application of compounds with high vapor pressure, namely, the air-tightness of the joint packaging of VCI and metal products. Infringement of packing air-tightness entails desorption of VCI from the metal surface followed by its corrosion. A fundamentally new opportunity for creating thin films capable of preventing corrosion of metal products in a humid atmosphere during their transportation and inter-operation storage is opened by the treatment of an item or semi-finished product to be protected in hot vapors of non-toxic compounds with low volatility under normal conditions. They evaporate at elevated temperature (t) in the enclosed space of a chamber and strongly adsorbed on the metal to create stable thin films that provide a long-term protective aftereffect under atmospheric conditions. This method of vapor-phase protection by chamber corrosion inhibitors has broad prospects of practical application. It has been proven by a complex of accelerated corrosion, electrochemical and optical methods that chamber treatment of zinc with vapors of low volatile corrosion inhibitors at t ≤ 100°C is capable of forming films on zinc surface that possess a prolonged protective after-effect. It has been shown that short-term chamber treatment in the vapor of a new inhibitor, IFKhAN-121, provides effective temporary protection of zinc, both in accelerated tests and when exposed in the industrial atmosphere of Moscow for 1 year. Received: June 27, 2018. Published: July 30, 2018 doi: 10.17675/2305-6894-2018-7-3-5

A new corrosion inhibitor for zinc chamber treatment