CN105755486A - Stainless steel room temperature pickling process - Google Patents
Stainless steel room temperature pickling process Download PDFInfo
- Publication number
- CN105755486A CN105755486A CN201410762041.4A CN201410762041A CN105755486A CN 105755486 A CN105755486 A CN 105755486A CN 201410762041 A CN201410762041 A CN 201410762041A CN 105755486 A CN105755486 A CN 105755486A
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- CN
- China
- Prior art keywords
- pickling
- hydrogen peroxide
- step pickling
- flowing water
- acid
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
- C23G1/083—Iron or steel solutions containing H3PO4
Abstract
The invention discloses a stainless steel room temperature pickling process. The process is characterized by including that: 1) the technological procedure consists of: stainless steel part hanging, chemical degreasing, hot water washing, flowing water washing, first step pickling, flowing water washing, second step pickling, flowing water washing, and shift to a next step; 2) the technical requirements include that: the purpose of the first step pickling is to remove black skin and inclusions and part of oxide skin at welding parts and welding seams, by means of optimal screening, the determined technological specifications are as the following: 300mL/L hydrochloric acid; 60mL/L phosphoric acid; 120mL/L hydrogen peroxide; 80mL/L a stabilizer; and 2mL/L a surfactant; and 3) after the first step pickling treatment, the oxide film cannot be totally removed, a layer of grey film is attached to the surface, the luster is poor, and the second step pickling is necessary to remove the surface grey film so as to reach a light degree approximate to a mirror surface, and optimal screening experiment verifies the following technological specifications of: 300mL/L hydrofluoric acid; 200mL/L sulfuric acid; 240mL/L hydrogen peroxide; 80mL/L a hydrogen peroxide stabilizer; 0.5g/L a pickling corrosion inhibitor; and 2mL/L a surfactant.
Description
Technical field
The present invention relates to a kind of rustless steel room temperature acid cleaning process.
Background technology
Rustless steel has good mechanical strength, wearability, corrosion resistance and the easy premium properties such as processing, is widely used in the industries such as petrochemical industry, light industry household electrical appliances, machine-building, boats and ships vehicle and building decoration.And stainless steel part is mostly the work in hot environments such as hot rolled, forging, casting, heat treatment, welding processes, in the course of processing, surface can produce thicker oxide skin, for the ease of being smoothed out of sequent surface treatment process, it is necessary to remove its surface scale through overpickling.The acid cleaning process that present stage adopts removes stainless steel surfaces heavy scale, use temperature is high, and pickling time is long, causes that processing cost is high and room temperature descaling technique is effective to removing thin oxide skin, heavy scale effect is undesirable, and particularly the black slag of weld is substantially except not falling.
Summary of the invention
Because the drawbacks described above of prior art, the technical problem to be solved is to provide a kind of rustless steel room temperature acid cleaning process, this acid cleaning process process after stainless steel surfaces cleaning light there is colour-fast, the not advantage such as loss of gloss, not easily yellowing, pickle is without nitric acid, producing without tobacco, environmental pollution is little.
For achieving the above object, the invention provides a kind of rustless steel room temperature acid cleaning process, it is characterized in that, comprise the steps, 1) technological process: on stainless steel part extension → electrochemical deoiling → hot water wash → flowing water wash → first step pickling → flowing water washes → second step pickling → flowing water washes → proceed to next procedure；
2) technological requirement: the main purpose of first step pickling is to remove the casting skin of weld and weld seam and field trash and partial oxidation skin, optimized screening, it is determined that technological specification as follows: hydrochloric acid 300mL/L；Phosphoric acid 60mL/L；Hydrogen peroxide 120mL/L；Stabilizer 80mL/L；Surfactant 2mL/L；
3) oxide-film can not be eliminated after first step pickling processes completely, one layer of grey film of surface attachment, gloss is poor, have to pass through second step pickling, remove surface grey film so that it is reach approximate bright in mirror surface, optimized screening experiment is verified, adopts following technological specification: Fluohydric acid. 300mL/L；Sulphuric acid 200mL/L；Hydrogen peroxide 240mL/L；Hydrogen peroxide stabilizer 80mL/L；Restrainer 0.5g/L；Surfactant 2mL/L.
The invention has the beneficial effects as follows: acid cleaning process of the present invention process after stainless steel surfaces cleaning light there is colour-fast, the not advantage such as loss of gloss, not easily yellowing, pickle is without nitric acid, and without tobacco generation, environmental pollution is little.
Detailed description of the invention
Technical scheme disclosed by the invention is a kind of rustless steel room temperature acid cleaning process, it is characterized in that, comprise the steps, 1) technological process: on stainless steel part extension → electrochemical deoiling → hot water wash → flowing water wash → first step pickling → flowing water washes → second step pickling → flowing water washes → proceed to next procedure；
2) technological requirement: the main purpose of first step pickling is to remove the casting skin of weld and weld seam and field trash and partial oxidation skin, optimized screening, it is determined that technological specification as follows: hydrochloric acid 300mL/L；Phosphoric acid 60mL/L；Hydrogen peroxide 120mL/L；Stabilizer 80mL/L；Surfactant 2mL/L；
3) oxide-film can not be eliminated after first step pickling processes completely, one layer of grey film of surface attachment, gloss is poor, have to pass through second step pickling, remove surface grey film so that it is reach approximate bright in mirror surface, optimized screening experiment is verified, adopts following technological specification: Fluohydric acid. 300mL/L；Sulphuric acid 200mL/L；Hydrogen peroxide 240mL/L；Hydrogen peroxide stabilizer 80mL/L；Restrainer 0.5g/L；Surfactant 2mL/L.
Acid cleaning process of the present invention process after stainless steel surfaces cleaning light there is colour-fast, the not advantage such as loss of gloss, not easily yellowing, pickle is without nitric acid, and without tobacco generation, environmental pollution is little.
The preferred embodiment of the present invention described in detail above.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to the design of the present invention without creative work.Therefore, all technical staff in the art, all should in the protection domain being defined in the patent claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (1)
1. a rustless steel room temperature acid cleaning process, it is characterised in that comprise the steps,
1) technological process: on stainless steel part extension → electrochemical deoiling → hot water wash → flowing water wash → first step pickling → flowing water washes → second step pickling → flowing water washes → proceed to next procedure；
2) technological requirement: the main purpose of first step pickling is to remove the casting skin of weld and weld seam and field trash and partial oxidation skin, optimized screening, it is determined that technological specification as follows: hydrochloric acid 300mL/L；Phosphoric acid 60mL/L；Hydrogen peroxide 120mL/L；Stabilizer 80mL/L；Surfactant 2mL/L；
3) oxide-film can not be eliminated after first step pickling processes completely, one layer of grey film of surface attachment, gloss is poor, have to pass through second step pickling, remove surface grey film so that it is reach approximate bright in mirror surface, optimized screening experiment is verified, adopts following technological specification: Fluohydric acid. 300mL/L；Sulphuric acid 200mL/L；Hydrogen peroxide 240mL/L；Hydrogen peroxide stabilizer 80mL/L；Restrainer 0.5g/L；Surfactant 2mL/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410762041.4A CN105755486A (en) | 2014-12-13 | 2014-12-13 | Stainless steel room temperature pickling process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410762041.4A CN105755486A (en) | 2014-12-13 | 2014-12-13 | Stainless steel room temperature pickling process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105755486A true CN105755486A (en) | 2016-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410762041.4A Pending CN105755486A (en) | 2014-12-13 | 2014-12-13 | Stainless steel room temperature pickling process |
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| CN (1) | CN105755486A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107267999A (en) * | 2017-06-27 | 2017-10-20 | 浙江莱德桑机械有限公司 | It is a kind of for pickle of end socket surface cleaning and preparation method thereof |
| CN107502905A (en) * | 2017-10-25 | 2017-12-22 | 苏州华丰不锈钢紧固件有限公司 | A kind of acid cleaning process for effectively removing thick oxide film |
| CN108796520A (en) * | 2018-06-25 | 2018-11-13 | 苏州鑫金茂金属科技有限公司 | A kind of sheet metal component acid washing method |
| CN111575713A (en) * | 2020-06-03 | 2020-08-25 | 常州龙润环保科技有限公司 | Environment-friendly acidic treatment solution for laser processing of surface layer of metal roller and treatment method |
| CN112064048A (en) * | 2020-09-03 | 2020-12-11 | 浙江明铖金属科技有限公司 | High-precision cold heading finished wire processing device and process |
| CN113385478A (en) * | 2021-06-11 | 2021-09-14 | 江苏力源金河铸造有限公司 | Process for removing blackening of inner cavity wall of casting part |
| CN114086190A (en) * | 2021-11-01 | 2022-02-25 | 福建中晶科技有限公司 | Cleaning and maintaining method for ice machine unit for scaling |
| CN115074740A (en) * | 2022-05-11 | 2022-09-20 | 哈尔滨焊接研究院有限公司 | Low-nickel austenitic stainless steel solid welding wire surface cleaning solution and cleaning method |
| CN115386890A (en) * | 2022-08-22 | 2022-11-25 | 河南神恒实业有限公司 | Automatic casting part pickling device and pickling process |
-
2014
- 2014-12-13 CN CN201410762041.4A patent/CN105755486A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107267999A (en) * | 2017-06-27 | 2017-10-20 | 浙江莱德桑机械有限公司 | It is a kind of for pickle of end socket surface cleaning and preparation method thereof |
| CN107267999B (en) * | 2017-06-27 | 2019-09-20 | 浙江莱德桑机械有限公司 | A kind of pickling solution and preparation method thereof for end socket surface cleaning |
| CN107502905A (en) * | 2017-10-25 | 2017-12-22 | 苏州华丰不锈钢紧固件有限公司 | A kind of acid cleaning process for effectively removing thick oxide film |
| CN108796520A (en) * | 2018-06-25 | 2018-11-13 | 苏州鑫金茂金属科技有限公司 | A kind of sheet metal component acid washing method |
| CN108889696A (en) * | 2018-06-25 | 2018-11-27 | 苏州鑫金茂金属科技有限公司 | A kind of sheet metal component cleaning method |
| CN111575713A (en) * | 2020-06-03 | 2020-08-25 | 常州龙润环保科技有限公司 | Environment-friendly acidic treatment solution for laser processing of surface layer of metal roller and treatment method |
| CN112064048A (en) * | 2020-09-03 | 2020-12-11 | 浙江明铖金属科技有限公司 | High-precision cold heading finished wire processing device and process |
| CN113385478A (en) * | 2021-06-11 | 2021-09-14 | 江苏力源金河铸造有限公司 | Process for removing blackening of inner cavity wall of casting part |
| CN114086190A (en) * | 2021-11-01 | 2022-02-25 | 福建中晶科技有限公司 | Cleaning and maintaining method for ice machine unit for scaling |
| CN115074740A (en) * | 2022-05-11 | 2022-09-20 | 哈尔滨焊接研究院有限公司 | Low-nickel austenitic stainless steel solid welding wire surface cleaning solution and cleaning method |
| CN115386890A (en) * | 2022-08-22 | 2022-11-25 | 河南神恒实业有限公司 | Automatic casting part pickling device and pickling process |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160713 |
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| WD01 | Invention patent application deemed withdrawn after publication |