Stainless steel environment-friendly pickling solution

A kind of pickling solution, stainless steel technology, applied in the field of stainless steel environmental protection pickling solution

Inactive Publication Date: 2013-08-14
张文卓
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, as the reaction proceeds, the reaction temperature must be continuously increased, which brings difficulty in construction, and the process is not easy to control.

Method used

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  • Stainless steel environment-friendly pickling solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] As a preference: the environmental protection additive is compounded by the following components by weight:

[0106] Pickling dissolution accelerator 12-14kg, interface barrier adsorbent 1.2-2kg, double gas mask coagulant 0.4-1.2kg, regeneration agent 0.8-2kg, oxidation supplement 1.2-2kg, oxidation energy activator 1.2-2.4kg, new Complexing agent 6-8kg, complexing catalyst 2kg, corrosion inhibitor 0.8-1.2 kg, fog suppressant 0.4-2kg, penetrant 0.08-0.3 kg, passivator 5-10kg, brightener 0.8-1.2kg;

[0107] As a preference: the environmental protection additive is compounded by the following components by weight:

[0108] Pickling dissolution accelerator: compounded with 1-5 kg ​​of ethylenediamine and 8-12 kg of aminotrimethylene phosphonic acid;

[0109] Interface barrier adsorbent: compounded with 0.5 kg of polymerized ethylene glycol, 0.5-1 kg of organic amine antistatic agent, and 0.2-0.5 kg of diethylene glycol;

[0110] Double gas mask coagulant: compounded by ...

Embodiment 2

[0129] Effective concentration of nitric acid: 10-30% (mass percentage)

[0130] Concentration of environmental protection additives: 3-5% (mass percentage)

[0131] (2) Quantitative preparation example:

[0132] ① Nitric acid (65% type including specification): 200-500 kg; additive: 30-50 kg; water: 770-450 kg;

[0133] ② Nitric acid (98% type including specification): 120-300 kg; additive: 30-50 kg; water: 850-650 kg.

[0134] (3) Groove matching method:

[0135] ① Add fresh water that meets the metering requirements;

[0136] ② Adding "environmental protection additives" that meet the metering requirements;

[0137] ③ Add the "nitric acid" that conforms to the metering;

[0138] ④ Stir until completely dissolved.

[0139] Quantitative maintenance of pickling solution:

[0140] 1. Overview of bath maintenance:

[0141] ① As the pickling process proceeds, a certain amount of "environmental protection additives" should be added to each shift to maintain the normal prog...

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Abstract

The invention discloses a stainless steel environment-friendly pickling solution. The stainless steel environment-friendly pickling solution is characterized by being compounded by nitric acid, environment-friendly additives and water. During an environment-friendly picking process design process, process data allowance has been reserved. The using concentration of the nitric acid has a wider range, and the using concentration of the additives has a wide enough range, so that a satisfactory pickling effect can be achieved by operating within the ranges, and therefore, simple maintenance can be carried out according to experimental parameters, and the method is simple and practical.

Description

technical field [0001] The invention relates to the technological field of metal material cleaning, stainless steel surface treatment, stainless steel pickling, cleaning, passivation, and heavy oil removal, in particular to a stainless steel environment-friendly pickling solution. Background technique [0002] For the scale, welding spots, stains, rust, and oil stains on the surface of stainless steel, the common processing techniques are as follows: [0003] 1. Hydrochloric acid pickling process [0004] The pickling solution is mainly hydrochloric acid, and sometimes sulfuric acid is added to improve the pickling ability; this kind of solution has simple components, slow pickling performance, and sometimes needs heating. The matrix is ​​very destructive, erodes the microscopic voids of the matrix, causes pitting corrosion, is more likely to cause intergranular corrosion, stress corrosion, and destroys the passivation antirust film, causing serious safety hazards and corr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/08
Inventor 张文卓马建军
Owner 张文卓
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