CS272469B1 - Preservative to protect metal surfaces from corrosion - Google Patents

Abstract

The preservative is intended for anti-corrosion protection of steel products and products made of non-ferrous metals, especially brass, aluminum, as well as steel products with non-ferrous metal parts. It can be used mainly for short-term or long-term preservation of bearing parts and assembled bearings. In addition to good anti-corrosion efficiency, the preservative is characterized by good lubricating properties and has advantageous rheological properties - it creates a fine, non-flowing transparent film that does not grease the packaging. The preservative can be filtered well. It can be applied cold or in the form of fine petroleum jelly at slightly elevated temperatures (approx. 40 - 50 °C). It contains a reaction product formed by mixing 0.1 to 65% by weight of lanolin, 0.05 to 15% by weight of aliphatic and/or alicyclic amine, 0.05 to 18% by weight of aliphatic and/or aromatic carboxylic acids and/or their salts, 0.01 to 2% by weight of benzotriazole or alkylbenzotriazole, 0.05 to 1.2% by weight of a mixture of petroleum hydrocarbons with a viscosity of 2.0 to 500 mm2.s"·'' at 40 °C, and may further contain 0.02 to 4.5% by weight of N-caprolactam and 0.1 to 1.8% by weight of phthalic anhydride.

Description

CS 272 469 B1

BACKGROUND OF THE INVENTION The present invention relates to a preservative for the protection of metal products, in particular corrosion, in particular atmospheric. Spray compositions, blends of petroleum products (kerosene, oils, petrolatum, bitumen, and others) and corrosion inhibitors, or other additives, are used to counteract corrosion protection. The range of corrosion inhibitors is extensive. It represents a large number of type and specific compounds. It may be possible to exchange alkylaryl, magnesium, calcium, barium, zinc, sodium, lithium, ammonium, imidazoline, benzimidazole, benztriazole, tetrazole, pyridine, quinoline, mercaptobenzotriazole, succinimide, alkyl succinic acid esters, carboxylic acids, arai; -ncv aliphatic and alicyclic, nitrated aliphatic and aromatic compounds, carboxylic acid amides, dialkyldithiocarbamates, dialkyldithiophosphates, alkyl salicylates, aminoketones and lobes.

The anticorrosive preservative agents contain a combination of the above-mentioned compounds. In the synthesis of such compositions, the anticorrosive activity of these compositions is established in relation to iron alloys, dyestuffs (Cu, Al) and their alloys, as well as the combination of iron and color alloys, but also the physicochemical properties of these compositions, which would allow low preservation temperature, high adhesion to metal, oxidation resistance, adequate lubricating properties, good filterability, low biological activity, non-distinctive odor, transparency, low flammability and the like. Accordingly, a composition comprising additives of an alkylarylsulfonate, phosphonate, dielkyldithiophosphate, and succinimide type, and salts or amides of aliphatic amines and carboxylic acids, low molecular weight polyalkylene and a mixture of petroleum hydrocarbons having a flash point of min. . The preservative has satisfactory anticorrosive and rheological properties, but due to the large molecular weight variation of the polyalkylene, in some cases the complete solubility is not achieved, the part of the mixture is separated, the susceptible it affects the noise of the bearings, the filterability of the preservative is reduced during production and application. a more disadvantageous disadvantage is the increased demand for degreasing components and products prior to inspection or prior to assembly, as long as this degreasing is required.

The aforementioned disadvantages are solved by a preservative according to the invention, characterized in that it contains a reaction product formed by mixing 0.1 to 65% by weight of lanolin, 0.05 to 15% by weight of an aliphatic or alicyclic amine, 0.05 to 18% % of carboxylic acids aliphatic or aromatic with C8-6 or a salt thereof, 0.01 to 2% by weight of benzotriazole or alkylbenztriazole, 0.05 to 1.2% by weight of antioxidant and 15 to 99% by weight of petroleum distillate with viscosity 2 up to 500 mm ^ .s ”· 1 · at 40 ° C. Furthermore, the preservative may contain 0.02 to 4.5% by weight of cocaprolactam. It is another object that the preservative composition may contain 0.1 to 1.8% by weight of phthalic anhydride.

The preservative according to the invention is applied in a bulking stock at a temperature of 30-45 ° C or diluted with a suitable diluent at a concentration of 25-60% by weight by cold dip or spray. CS 272 469 B1 2

Under the conditions of application, the preservative is good filterable, forming a fine, transparent film of 2 to 30 µm on the treated surfaces. The mounted bearings have a regular run, their noise level does not deteriorate compared to the output check after installation. If desired, the preservative film is readily removable. To a large extent, due to the low weight of the protective film and the compatibility with the lubricants, the preservative-preserved products can be deconserved,

The preservative of the present invention is prepared by a process which is exemplified by: - Example 1

70 parts by weight of refined petroleum oil having a viscosity of 2.1 mm < 2 > at a temperature of 40 [deg.] C. are added to the mixing vessel, 0.1 parts by weight of dicurane lanolin is added and the mixture is heated to 40-50 [deg.] C. with stirring. After reaching the desired temperature, 0.05 parts by weight of octadecylamine, 0.01 parts by weight of benztriazole and 0.05 parts by weight of antioxidant (2.6 diterciarbutyl-4-methylphenol) are added. The mixture is allowed to homogenize (2 hours) at the above temperature and filtered hot into containers. The prepared preservative was used for the preservation of precision steel and brass engineering products for inter-operative storage (40 days). After storage, the products were shiny, free of stain and used in the next production process without deconservation.

Example 2

15 parts by weight of refined petroleum oil having a viscosity of 55 mm @ 2 at < RTI ID = 0.0 > 40 C < / RTI > and 65 parts by weight of lanolin are added to the mixing vessel and heated to 100 DEG and 5 DEG C. and 12 parts by weight of octadecylamine and 1.5 parts by weight are added. After thorough homogenization, 2.5 parts by weight of capric acid, 2 parts by weight of antioxidant (2,6-di-tertiarybutyl-4-methyl-phenol) and 2 parts by weight of tolyltriazole are added to the mixture. , cooled to 40 ° C and filtered into containers, 30 parts by weight of the prepared preservative dissolved in a petroleum distillate having a viscosity of 4.5 mm 2 at 20 ° C. used for the rolling of roller bearings: all-steel rolling bearings, bearings with brass and bearings with an aluminum cage were immersed for 2 minutes in the preservative at at 25 ° C. For canned bearings after dripping off excess preservative, they were wrapped in paper laminated with polyethylene, placed in paper boxes, and placed in a test chamber of the Feutron 3007 air chamber in which the following test cycle was set : a) 24 hours relative humidity change: 18 hours: 90 ± 5% 4 hours: relative humidity 2 hours: 100%

Claims (3)

B) Change in temperature over 24 hours: 16 hours: 38 ± 2 ° C for 4 hours: change in temperature 4 hours: 26-2 ° C. After nine weeks of testing, all bearings tested without corrosion, packaging or grease, and bearing noise were virtually unchanged from the state before the test. The known preservative oil tested under the same conditions gave a worse result in increased bearing noise. EXAMPLE 3 70.5 parts by weight of a selectively refined petroleum distillate having a viscosity of 71 mm @ 2 at 40 DEG C., 3 parts by weight of petrolatum and 12.5 parts by weight of lanolin are introduced into a homogenization vessel. The mixture is heated to 110 ° C and homogenized, 1.6 parts by weight of caprolactam is added and allowed to homogenize for 1 hour. Subsequently, 5.45 parts by weight of oleic acid (which contains about 15% by weight linoleic acid), 3.8 parts by weight of octadecylamine, 0.45 parts by weight of phthalic anhydride and 0.75 parts by weight of dibenzotriazole are added. The temperature of the mixture is raised to 145-165 ° C and allowed to homogenize, preferably with nitrogen, for 1.5 to 3 hours. After the homogenization of the carbon blacks is complete, it is cooled to 110 ° C, 1.2 parts by weight of aluminum stearate and 0.75 parts by weight of cumylphenol are added, the mixture is allowed to cool freely to about 45 ° C with stirring and filtered hot into the packages. The prepared preservative, dissolved at a concentration of 50% by weight in isodecane, was used to preserve rolling bearings similar to Example 2 and evaluated by the same procedures as in Example 2, except that the corona test was evaluated after 12 weeks of residence time Preserved and packaged specimens in a Peutron 3007 device. Practically consistent results as in Example 2 were achieved. SUBJECT VOilEZU What is claimed is: 1. A preservative for the protection of metal surfaces from corrosion comprising a reaction product which is formed by mixing 0.1 to 65% by weight of laolin, 0.05 to 15% by weight of an aliphatic and / or alicyclic amine, 0.05 to 18% by weight. % by weight of carboxylic acids aliphatic and / or aromatic with C8-C20 and / or salts thereof, 0.01 to 2% by weight of benztriazole or alkylbenzothiazole, 0.05 to 1.2% by weight of antioxidant and 15 to 99% by weight of petroleum hydrocarbons having a viscosity of 2.0 to 500 mm 3 at 40 ° C. 2. A preservative as claimed in claim 1, wherein the preservative comprises 0.02 to 4.5% by weight of caprolactam. 3. A preservative according to claim 1 or 2, characterized in that it contains 0.1 to 1.8 weight percent phthalic anhydride.