CN104630758A - 不锈钢封头的酸洗、钝化防腐方法 - Google Patents

不锈钢封头的酸洗、钝化防腐方法 Download PDF

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Publication number
CN104630758A
CN104630758A CN201310563293.XA CN201310563293A CN104630758A CN 104630758 A CN104630758 A CN 104630758A CN 201310563293 A CN201310563293 A CN 201310563293A CN 104630758 A CN104630758 A CN 104630758A
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stainless steel
passivation
pickling
seal head
neutral
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杜学梅
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Qingdao Xusheng Head Co Ltd
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Qingdao Xusheng Head Co Ltd
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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
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/48—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
    • C23C22/50—Treatment of iron or alloys based thereon
    • 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
    • C23G1/081—Iron or steel solutions containing H2SO4

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  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Treatment Of Metals (AREA)

Abstract

本发明公开了一种不锈钢封头的酸洗、钝化防腐方法，将不锈钢封头浸入浓度为8%的柠檬酸铵溶液中，在50-60℃的温度条件下浸泡处理30min，之后用清水冲洗至PH值为中性；将封头浸入浓度为30%的HNO药剂中进行钝化处理，处理温度为50-70℃,处理时间为15-20min，之后用清水冲洗至PH值为中性；将封头浸入浓度为10%的H2SO4药剂中，加热至70-75℃，处理30min，之后用清水冲洗至PH值为中性。方法简单，对不锈钢封头表面进行清洗、酸洗与钝化处理，不仅可以提高耐蚀性能，还具有防止产品污染并获得美观的作用。

Description

不锈钢封头的酸洗、钝化防腐方法
 
技术领域
本发明属于不锈钢封头防腐处理技术领域，具体涉及一种不锈钢封头的酸洗、钝化防腐方法。
 
背景技术
不锈钢具有良好的耐蚀性能，抗高温氧化性能，较好的低温性能及优良的机械加工性能，压力容器封头较多采用不锈钢材质，不锈钢封头在成形、焊接、及施工标记等过程中会带来表面油污、铁锈、非金属脏物等，这些物质影响了不锈钢设备与部件表面质量，破坏了其表面的氧化膜，降低了钢的抗全面腐蚀性能和抗局部腐蚀性能，甚至会导致应力腐蚀破裂。
 
发明内容
为了克服现有技术领域存在的上述技术问题，本发明的目的在于，提供一种不锈钢封头的酸洗、钝化防腐方法，方法简单，不仅能提高耐蚀性能，还可以获得美观的外形。
本发明提供的不锈钢封头的酸洗、钝化防腐方法，包括以下步骤：（1）将不锈钢封头浸入浓度为8%的柠檬酸铵溶液中，在50—60℃的温度条件下浸泡处理30min，之后用清水冲洗至PH值为中性；（2）将封头浸入浓度为30%的HNO药剂中进行钝化处理，处理温度为50—70℃,处理时间为15—20min,之后用清水冲洗至PH值为中性；（3）将封头浸入浓度为10%的H2SO4药剂中，加热至70—75℃，处理30min, 之后用清水冲洗至PH值为中性。
本发明提供的不锈钢封头的酸洗、钝化防腐方法，其有益效果在于，方法简单，对不锈钢封头表面进行清洗、酸洗与钝化处理，不仅可以提高耐蚀性能，还具有防止产品污染并获得美观的作用。
 
具体实施方式
下面结合一个实施例，对本发明提供的不锈钢封头的酸洗、钝化防腐方法进行详细的说明。
 
实施例
本实施例的不锈钢封头的酸洗、钝化防腐方法，包括以下步骤：（1）将不锈钢封头浸入浓度为8%的柠檬酸铵溶液中，在60℃的温度条件下浸泡处理30min，之后用清水冲洗至PH值为中性；（2）将封头浸入浓度为30%的HNO药剂中进行钝化处理，处理温度为70℃,处理时间为20min,之后用清水冲洗至PH值为中性；（3）将封头浸入浓度为10%的H2SO4药剂中，加热至70℃，处理30min, 之后用清水冲洗至PH值为中性。

Claims (1)

1.一种不锈钢封头的酸洗、钝化防腐方法，其特征在于：包括以下步骤：（1）将不锈钢封头浸入浓度为8%的柠檬酸铵溶液中，在50—60℃的温度条件下浸泡处理30min，之后用清水冲洗至PH值为中性；（2）将封头浸入浓度为30%的HNO药剂中进行钝化处理，处理温度为50—70℃,处理时间为15—20min,之后用清水冲洗至PH值为中性；（3）将封头浸入浓度为10%的H2SO4药剂中，加热至70—75℃，处理30min, 之后用清水冲洗至PH值为中性。
CN201310563293.XA 2013-11-14 2013-11-14 不锈钢封头的酸洗、钝化防腐方法 Pending CN104630758A (zh)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107587128A (zh) * 2017-08-09 2018-01-16 宁波市镇海甬鼎紧固件制造有限公司 一种不锈钢管的表面处理工艺
CN109663782A (zh) * 2017-10-16 2019-04-23 宜兴市联丰化工机械有限公司 一种清洗封头的工艺
RU2783432C1 (ru) * 2022-08-23 2022-11-14 Федеральное государственное бюджетное образовательное учреждение высшего образования "Российский химико-технологический университет имени Д.И. Менделеева" (РХТУ им. Д.И. Менделеева) Способ пассивации контактной поверхности оборудования из аустенитной никельсодержащей стали для защиты от воздействия агрессивных сред

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107587128A (zh) * 2017-08-09 2018-01-16 宁波市镇海甬鼎紧固件制造有限公司 一种不锈钢管的表面处理工艺
CN107587128B (zh) * 2017-08-09 2019-03-05 宁波市镇海甬鼎紧固件制造有限公司 一种不锈钢管的表面处理工艺
CN109663782A (zh) * 2017-10-16 2019-04-23 宜兴市联丰化工机械有限公司 一种清洗封头的工艺
RU2783432C1 (ru) * 2022-08-23 2022-11-14 Федеральное государственное бюджетное образовательное учреждение высшего образования "Российский химико-технологический университет имени Д.И. Менделеева" (РХТУ им. Д.И. Менделеева) Способ пассивации контактной поверхности оборудования из аустенитной никельсодержащей стали для защиты от воздействия агрессивных сред

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Application publication date: 20150520