Spring rust cleaning liquid and rust cleaning process

Abstract

The invention relates to rust cleaning liquid used for cleaning rust on the surface of a spring and a process adopting the dust cleaning liquid to clean rust for the spring. The spring rust cleaning liquid consists of the following components in percentage by weight: 25%-45% of phosphoric acid, 5%-10% of ethyoxyl alkyl sodium sulfate, 30%-50% of acetone, 8%-15% of catechol and the balance of deionized water. The spring rust cleaning liquid is utilized to carry out rust cleaning on the spring, so that greasy dirt and a rust layer on the surface of the spring can be removed at the same time, a phosphating film also can be generated on the spring surface, and therefore, the process is simplified; the process is free of environmental pollution, free of any harm on operation staff, low in cost, high in rust-cleaning speed, free of corrosion on spring, long in rust-preventing time, and capable of strengthening binding force between the metal surface and the paint.

Description

technical field

[0001] The invention relates to a derusting liquid for derusting the surface of springs and a process for derusting springs using the derusting liquid, in particular to a formula of derusting liquid and a derusting process thereof, belonging to metal anticorrosion or derusting technology field. Background technique

[0002] During mechanical processing and subsequent processes, springs are prone to rust due to the influence of temperature, humidity and air medium in the atmospheric environment. Severe corrosion may affect the surface quality of spring electroplating, painting and other subsequent processes. Although anti-rust oil can be applied to the surface of machined springs to achieve the purpose of anti-rust, it is necessary to use gasoline and other solvents to remove the oil film on the spring surface before subsequent processes (such as electroplating, painting, etc.), and gasoline is flammable and volatile. It brings potential safety hazards to wor...

Examples

Embodiment 1

[0021] A spring derusting solution is prepared, which comprises the following components according to weight percentage: 25% phosphoric acid, 5% ethoxylated alkyl sodium sulfate, 20% acetone, 8% catechol, and the rest is deionized water. This formulation is even more effective if nickel phosphate or zinc phosphate is included.

[0022] The specific process of using the above-mentioned spring descaling liquid to derust the spring is as follows: (1) clean the spring with gasoline, acetone, etc. to remove oil; (2) immerse the spring in the descaling liquid for 3 minutes; (3) use deionized water Rinse the spring for 1 minute; (4) immediately carry out neutralization treatment: the spring is immersed in 1% sodium carbonate aqueous solution for about 5 minutes; (5) passivation treatment: the spring is immersed in a potassium dichromate solution with a concentration of 2 grams per liter, Heat to 80°C-90°C and soak for 5 minutes, then take it out; (6) Rinse the spring with tap water a...

Embodiment 2

[0024] A spring derusting liquid is prepared, and the spring derusting liquid includes the following components according to weight percentage: 45% phosphoric acid, 10% sodium ethoxylated alkyl sulfate, 30% acetone, 11.5% catechol, and the remaining deionized water. This formulation is even more effective if nickel phosphate or zinc phosphate is included.

[0025] The specific process of using the above-mentioned spring derusting liquid to remove rust on the spring is as follows: (1) clean the spring with gasoline, acetone, etc. to remove oil; (2) immerse the spring in the derusting liquid for 6 minutes; (3) use deionized water Rinse the spring for 3 minutes; (4) immediately carry out neutralization treatment: the spring is immersed in 3% sodium carbonate aqueous solution for about 1 minute; (5) passivation treatment: the spring is immersed in a potassium dichromate solution with a concentration of 4 grams per liter, Heat to 80°C-90°C and soak for 2 minutes, then take it out; ...

Embodiment 3

[0027] A spring derusting solution is prepared, which comprises the following components according to weight percentage: 35% phosphoric acid, 7.5% sodium ethoxylated alkyl sulfate, 40% acetone, 15% catechol, and the remaining deionized water. This formulation is even more effective if nickel phosphate or zinc phosphate is included.

[0028] The specific process of using the above-mentioned spring derusting liquid to remove rust on the spring is as follows: (1) clean the spring with gasoline, acetone, etc. to remove oil; (2) immerse the spring in the derusting liquid for 4 minutes; (3) use deionized water Rinse the spring for 2 minutes; (4) Immediately carry out neutralization treatment: the spring is immersed in 2% sodium carbonate aqueous solution for about 3.5 minutes; (5) passivation treatment: the spring is immersed in a potassium dichromate solution with a concentration of 3 grams per liter, Heat to 80°C-90°C and soak for 3 minutes, then take it out; (6) Rinse the spring ...

technical field

[0001] The invention relates to a derusting liquid for derusting the surface of springs and a process for derusting springs using the derusting liquid, in particular to a formula of derusting liquid and a derusting process thereof, belonging to metal anticorrosion or derusting technology field. Background technique

[0002] During mechanical processing and subsequent processes, springs are prone to rust due to the influence of temperature, humidity and air medium in the atmospheric environment. Severe corrosion may affect the surface quality of spring electroplating, painting and other subsequent processes. Although anti-rust oil can be applied to the surface of machined springs to achieve the purpose of anti-rust, it is necessary to use gasoline and other solvents to remove the oil film on the spring surface before subsequent processes (such as electroplating, painting, etc.), and gasoline is flammable and volatile. It brings potential safety hazards to wor...

Examples

Embodiment 1

[0021] A spring derusting solution is prepared, which comprises the following components according to weight percentage: 25% phosphoric acid, 5% ethoxylated alkyl sodium sulfate, 20% acetone, 8% catechol, and the rest is deionized water. This formulation is even more effective if nickel phosphate or zinc phosphate is included.

[0022] The specific process of using the above-mentioned spring descaling liquid to derust the spring is as follows: (1) clean the spring with gasoline, acetone, etc. to remove oil; (2) immerse the spring in the descaling liquid for 3 minutes; (3) use deionized water Rinse the spring for 1 minute; (4) immediately carry out neutralization treatment: the spring is immersed in 1% sodium carbonate aqueous solution for about 5 minutes; (5) passivation treatment: the spring is immersed in a potassium dichromate solution with a concentration of 2 grams per liter, Heat to 80°C-90°C and soak for 5 minutes, then take it out; (6) Rinse the spring with tap water a...

Embodiment 2

[0024] A spring derusting liquid is prepared, and the spring derusting liquid includes the following components according to weight percentage: 45% phosphoric acid, 10% sodium ethoxylated alkyl sulfate, 30% acetone, 11.5% catechol, and the remaining deionized water. This formulation is even more effective if nickel phosphate or zinc phosphate is included.

[0025] The specific process of using the above-mentioned spring derusting liquid to remove rust on the spring is as follows: (1) clean the spring with gasoline, acetone, etc. to remove oil; (2) immerse the spring in the derusting liquid for 6 minutes; (3) use deionized water Rinse the spring for 3 minutes; (4) immediately carry out neutralization treatment: the spring is immersed in 3% sodium carbonate aqueous solution for about 1 minute; (5) passivation treatment: the spring is immersed in a potassium dichromate solution with a concentration of 4 grams per liter, Heat to 80°C-90°C and soak for 2 minutes, then take it out; ...

Embodiment 3

[0027] A spring derusting solution is prepared, which comprises the following components according to weight percentage: 35% phosphoric acid, 7.5% sodium ethoxylated alkyl sulfate, 40% acetone, 15% catechol, and the remaining deionized water. This formulation is even more effective if nickel phosphate or zinc phosphate is included.

[0028] The specific process of using the above-mentioned spring derusting liquid to remove rust on the spring is as follows: (1) clean the spring with gasoline, acetone, etc. to remove oil; (2) immerse the spring in the derusting liquid for 4 minutes; (3) use deionized water Rinse the spring for 2 minutes; (4) Immediately carry out neutralization treatment: the spring is immersed in 2% sodium carbonate aqueous solution for about 3.5 minutes; (5) passivation treatment: the spring is immersed in a potassium dichromate solution with a concentration of 3 grams per liter, Heat to 80°C-90°C and soak for 3 minutes, then take it out; (6) Rinse the spring ...