CS216266B3 - Mixture with the anticorrosion effect - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anticorrosive composition intended for temporary corrosion protection of steel components, in particular bearing pads, according to the author's certificate no. 216266 (PV 280-80)

Corrosion-proof mixture according to the author's certificate no. 216265 (PV 280-80) consists of 5 to 90% by weight of an alkanolamine and a higher fatty acid condensate or of the oxyethylated higher fatty acid alkanolamides, preferably 22 to 70% by weight of a fatty acid diethanolamide of the general formula

OH-CH2-CH2-N-COR, where oh-ch ₂ -ch ₂

R is alkyl of C ₈ to C, or mixtures thereof, from 0.5 to 20% by weight of alkanolamine alelbo alkyl amine having a carbon number of 8 to 18 molecules, preferably octadecylamine, or mixtures thereof, 23-78% by weight of surfactant types polyglykoléterfosfátovanýoh

ABOUT

R (OC ₂ H ₄ ) _n -OP-OH 1

OH

ABOUT

R (OC ₂ H ₄ ) _n -OPO- (C ₂ H ₄ O) _n R OH wherein R is alkyl or alkylphenyl, n = 4 to 8 or mixtures of their sodium or triethanolamine salts. Further, the mixture comprises 0.05-5% by weight of henztriazole and 0.5-15% by weight of the sodium or ammonium salt of benzoic acid or a mixture thereof, and the remainder to 100% by weight is water.

Anti-corrosion mixture according to the author's certificate no. 216265 (PV 280-80) is applied at a concentration of 0.8 to 5% by weight in water at a temperature of 20 ° C to 85 ° C. The stability of the working solution does not change substantially for 20 to 30 hours. Conventional practice, however, requires increasing the stability of the working solution, since the phasing of the system affects both the corrosion resistance and the appearance of the preserved parts.

The requirement satisfying the practice is fulfilled by a mixture with anticorrosive effect for the protection of iron alloy parts, in particular bearing rings against atmospheric corrosion according to the author's certificate no. No. 216265 (PV 280-80), characterized in that it contains from 0.5 to 70% by weight of alkanolamine or alkylamine having a carbon number of 2 to 18, preferably actadecylamine or mixtures thereof, from 0.5 to 7% by weight of complexing agent preferably a quaternary salt of ethylenediaminetetraacetic acid and 0.2 to 10% by weight of a copolymer of ethylene oxide and propylene oxide.

The anticorrosive composition according to the invention forms a clear solution with water and is applied at a concentration of 0.8 to 5% by immersion or spraying the components at a temperature of 20 ° C to 85 ° C for 1 to 10 minutes. A dried, non-sticky film of anticorrosive active ingredients is formed on the dried components, which protects the metal surface from atmospheric corrosion upon in-process storage of the components, in particular bearing rings, at a relative humidity of not more than 80% for 5 to 25 days. The stability of the working solution does not change substantially for 85 to 170 hours, even at an operating temperature of 85 ° C. The film formed can be removed from the surface of the components after the required protection period either with aqueous solutions or non-aqueous solvents, e.g. kerosene, or it may be left on the surface of the components, since it does not impair the corrosion efficiency of the temporary corrosion protection means, e.g. preservative oils.

The anticorrosive composition according to the invention intended to protect steel components, in particular bearing rings, from atmospheric corrosion is explained in greater detail in the following examples:

Example g lauric acid diethanolamide

12.3 g of triethanolamine oil

7.5 g triethanolamine benzoate 5.0 g sodium benzoate

14.0 g sodium salt of a mixture of mono- and diester of phosphoric acid and a fatty alcohol (C 12 -C ₄₎ oxietylovaného 4 moles of ethylene oxide

1.2 g of ethylene-propylene oxide copolymer

10.0 g triethanolamine

3.2 g four-sodium salt of ethylenediaminetetraacetic acid 5.8 g water

Claims (1)

Wherein R is alkyl or alkylphenyl, n = 4 to 8 or mixtures of their sodium or triethane amine salts. Furthermore, the mixture contains 0.05 to 5% by weight of benzotriazole and 0.5 to 15% by weight of benzoic acid or ammonium salt or a mixture of these and water to a total of 100% by weight. The anticorrosive composition of Authentication No. 216265 (PV 280-80) is injected at a concentration of 0.8 to 5% by weight in water at a temperature of 20 ° C to 85 ° C. The stability of the propellant solution is significantly reduced over a period of 20 to 30 hours. However, the common practice requires increasing the stability of the workflow, since the phasing of the system affects the piroticorous resistance of the eye as well as the conserved components. The requirement for a satisfactory blend with the anticorrosive effect on the protection of iron alloy parts, especially bearing rings, against atmospheric corrosion of the author's certificate No. 216265 (PV280-80), the essence of which is that it contains 0, 5 to 70% by weight of alkanol amine or alkylamine having a carbon number of 2 to 18, preferably actadecylamine or a mixture thereof, 0.5 to 7% by weight of a complexing agent, preferably four-sodium salt of ethylenediaminetetraacetic acid and 0.2 to 10% by weight of copolymer ethylene oxide and propylene oxide. The anticorrosive composition according to the invention produces a clear solution with water and is applied at a concentration of 0.8 to 5% by weight and by immersion or spraying of the components at a temperature of 20 ° C to 85 ° C for 1 to 10 minutes. non-sticky anticorrosive film, which kicks the metal surface before atmospheric corrosion piri interstitially stored components, in particular bearing rings, at a relative ambient humidity of not more than 80% pooas 5 to 25 days. The stability of the working solution is not substantially altered at a time of 85-170 ° C, even at a working temperature of 85 ° C. The film formed can be removed from the surface of the components of the desired protection time even with aqueous solutions or with non-aqueous solvents. e.g. kerosene, possibly on the surface of the components, because it does not impair the anticorrosive efficacy of temporary anticorrosive agents, e.g., preservative oils. The anticorrosive composition according to the invention, intended to protect the steel components, in particular bearing rings, from atmospheric corrosion is explained in more detail below: Example 41 g of lauric diethanolamide 12.3 g of oily triethanolamine 7, 5 g benzoate triethanolamine 5.0 g sodium benzoate 14.0 g sodium salt of a mixture of phosphoric acid and fatty alcohol mono- and diesters (C12-C14) oxiethylated with 4 moles of ethylene oxide 1.2 g of ethylene-propylene oxide copolymer 10, 0 g triethanol amine 3.2 g ethylenediamine-tetraacetic acid quadodium salt 5.8 g water OBJECTS OF THE INVENTION Anti-corrosion coating composition for the protection of iron alloy components, especially bearing rings, from atmospheric corrosion protection of author certificate No 216265 (PV280) -80) characterized in that it contains 0.5 to 70% by weight of alkanol of amine or alkylamine with a carbon number of 2 to 18, preferably octadecylamine or ichz %, 0.5 to 7% by weight of the complexing agent, preferably four-diethylenediaminetetraacetic acid, and 0.2 to 10% by weight of ethylene oxide / propylene oxide copolymer.