Compound gaseous-phase rust inhibitor as well as preparation method and application thereof

Abstract

The invention relates to a compound gaseous-phase rust inhibitor as well as a preparation method and application thereof. The compound gaseous-phase rust inhibitor comprises the following components in percentage by mass: 25%-30% of nonpolar amino acid, 3%-5% of benzotriazole, 25%-30% of organic diacid salt and 35%-40% of benzoate. A plastic masterbatch containing the compound gaseous-phase rust inhibitor comprises the following components in percentage by mass: 30-40% of compound rust inhibitor, 50-60% of carrier plastics and 10-20% of adjuvant. Compared with the prior art, the compound gaseous-phase rust inhibitor has the advantages that nonpolar amino acid is selected by regulating and controlling the polarity of an amino acid molecule, and the compatibility of an amino acid rust inhibitor and a plastic film is improved by utilizing the good corrosion resistance of an amino acid compound, taking fumed silica as a dispersion carrier and utilizing the characteristics of the large specific surface area, strong surface adsorbability and good dispersibility of fumed silica, so that the rust inhibiting capacity of a volatile rust-inhibiting plastic film is improved.

Description

technical field [0001] The invention relates to an antirust agent, in particular to a composite gas phase antirust agent and its preparation method and application. Background technique [0002] Atmospheric corrosion is the most widespread kind of corrosion, and the losses caused account for more than half of all corrosion losses. The traditional anti-rust packaging process using anti-rust oil, because metal products need to use organic solvents such as chlorofluorocarbons to remove the residual grease on the metal surface before unpacking, not only cumbersome, but also chlorofluorocarbons can destroy the earth's atmospheric ozone layer, this method increasingly restricted. Vapor phase antirust technology has the characteristics of easy to use, clean and clean, and has become an important direction in the development of atmospheric corrosion prevention technology. Vapor-phase corrosion inhibitor, also known as volatile corrosion inhibitor (VCI for short), is a kind of anti...

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Problems solved by technology

Different amino acids have a lot of corrosion inhibition effects on different materials (carbon steel, copper and copper alloys, aluminum and aluminum alloys, magnesium alloys, lead, nickel, stainless steel, Pb-Sb-Se-As alloys, aluminum carbide silicon, etc.) It is reported in the literature, but it is mainly used in water-based solutions, and it has not been involved in the use of them in gas-phase anti-rust plastic films. The main reason is that amino acids are amphoteric compounds with high molecular polarity. They are used to make gas-phase anti-rust plastic films and stored for a period of time. Will separate out from the plastic film, resulting in poor appearance and rust resistance of the plastic packaging film

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