CS243566B1 - Preservative oil, especially for pressing and degreasing - Google Patents

Abstract

The invention relates to a preservative oil for preserving steel sheets and strips intended in particular for long-term transport and storage, for pressing and degreasing. The oil consists of 83 to 92% by weight of mineral oil with a viscosity of 20 to 200 mm2si_'1 at 20 °C, further of 3 to 5% by weight of sodium mahogany sulfonate with a molecular weight of 780 to 900 and a concentration of 50% in refined mineral oil, 4 to 8% by weight of olein, 1 to 4% by weight of diethanolamine and triethanolamine individually or in combination.

Description

(54) Preservative oil, in particular for pressing and degreasing

2

The invention relates to a preservative oil for the preservation of steel sheets and strips intended in particular for long-term transport and storage, for pressing and degreasing.

The oil consists of 83 to 92% by weight of a mineral oil having a viscosity of 20 to 20%

20U mm ^{_ i2} a ^'1 at 20 ° C, further from 3 to 5% by weight. Sodium mahagonsulfonate having a molecular weight of 780 to 900 and a concentration of 50% in refined mineral oil of 4 to 10 wt. 1 to 4 wt. diethanolamine and triethanolamine individually or in combination with each other.

The invention relates to a preservative oil for the preservation of steel sheets and strips with suitable compression and degreasing properties.

The preservative oils used hitherto serve to protect the material against corrosion during short-term storage. When transporting, storing and cold pressing or otherwise working steel sheets or strips, they do not fulfill the condition of at least six months of corrosion protection, good lubricant function and good degreasing.

These disadvantages are overcome by a preservative oil suitable for the preservation of steel sheets and strips, especially intended for long-term transportation, long-term storage, pressing and degreasing according to the invention.

The essence of the invention consists in that the oil consists of 83 to 92% by weight of mineral oil having a viscosity of 20 to 200 mm ² s ¹ at 20 ° C, 3 to 5% of sodium mahogany sulphonate having a molecular weight of 780 to 900 and a concentration of 50%. in refined mineral oil, 4 to 8% olein and 1 to 4% diethanolamine or triethanolamine individually or in combination with each other.

The individual ingredients described in the literature have anticorrosive effects, but their development is extensive in their combination, since the trend of development follows the use of multifunctional ingredients which, in their combined effect, translate into maximum synegrism.

The advantages of the preservative oil according to the invention are mainly that, by combining the individual additives, it provides sufficient protection for at least six months against atmospheric corrosion and has good degreasing properties, emulsifies with water in any ratio, thus reducing the consumption of alkali and energy in degreasing, such as body plates intended for further surface treatment.

Examples of preservative oil compositions according to the invention:

1. sample:

Preservative oil containing a complex corrosion inhibitor containing 3,5% of sodium mahoganyl sulphonate of a molecular weight of 780 to 900 and a concentration of 50% in refined mineral oil, 5% olein, 2,5% di- + triethanolamine in a ratio of 1: 1 and 89 ° / o mineral oil having a viscosity of 100 mm ² s ^-1 at 20 ° C.

2nd sample:

Preservative oil containing a complex corrosion inhibitor containing 3% of sodium mahoganyl sulphonate of a molecular weight of 780 to 900 and a concentration of 50% in refined mineral oil, 3% olein, 1% triethanolamine and 93% mineral oil with a viscosity of 170 mm ² s ^-1 at 20 ° C .

3. sample:

Preservative oil containing a complex corrosion inhibitor containing 5% by weight of sodium mahoganyl sulphonate of a molecular weight of 780 to 900 and a concentration of 50% in refined mineral oil, 3% olein, 4% di- + triethanolamine 2: 1 and 83% mineral oil of 50 mm ² at 20 ° C.

The 3 samples as compared with the preservative oil used so far (sample 4), i. j. containing 92% / o mineral oil, 7% calcium petrosulphonate and 1% / o corrosion inhibitor from import (without composition), respectively. in comparison with mineral oil B2 (sample 5) without inhibitor, they exhibit the following parameters:

parameters

Kinematic viscosity mm ² si at 20 ° C 115

Corrosion test in condensation chamber CSN 038 131 (relative humidity 100%, temperature 35 ^Q C, duration 14 days, steel plate quality)

305.21) neg.

Degreasing ability - -% loss (by immersion in 2% / o alkali solution at +85 ° C for 30 seconds) 95

Coefficient of friction (BSA) 0.200

Compressibility: in% (SWIFT calibration test) 53 and no. 1

Sample designation

2 3 4 5 195 70 110 75 neg. neg. Pos. Pos. 90 97 35 40 0,195 0,200 0,202 0,204 54 53 48 51

The invention can be utilized, in particular, by oil producers or commercial organizations, directly to the users in completing and dosing the oils.

Claims (1)

243566 Parameters 1 Kinematic viscosity mm2s-i at 20 ° C 115 Condensation corrosion test CSN 038 131 (relative humidity 100%, temperature 35 QC, duration 14 days, quality of steel sheet 11 305.21) neg. Degreasing ability - -% loss (by immersion to 2 ° / o alkali solution at +85 ° C for 30 sec) 95 Coefficient of friction coefficient (BSA) 0,200 Compressibility: in% (SWIFT curing test) 53 abu 1 'ka No. 1 Identification of the sample 2 3 4 5 195 70 110 75 neg. neg. 90 97 35 40 0,195 0,200 0,202 0,204 54 53 48 51 The invention can be used especially in production plants, or in trade organizations, directly by users when assembling and dispensing oils. PR EDME τ Preservative oil especially for preserving steel sheets and strips intended for long-term transport and storage, for pressing and degreasing, characterized in that it consists of 83 to 92% mineral oil with viscosity of 20 to 200 mm2s-1 at 20 ° C, further from 3% to 5% by weight of mahoganylsulfonate, having a molecular weight of 780 to 900 and a concentration of 50% in refined mineral oil, 4 to 8% by weight of olein and 1 to 4% by weight of diethanolamine triethanolamine individually or in combination with each other.