CN109652791A - 一种提升钛合金在硫酸溶液中耐蚀性的方法 - Google Patents

一种提升钛合金在硫酸溶液中耐蚀性的方法 Download PDF

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CN109652791A
CN109652791A CN201811564461.6A CN201811564461A CN109652791A CN 109652791 A CN109652791 A CN 109652791A CN 201811564461 A CN201811564461 A CN 201811564461A CN 109652791 A CN109652791 A CN 109652791A
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sulfuric acid
acid solution
titanium alloy
corrosion
promotion
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王雷
赵晓明
赵伟
张宝宁
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Xian Bright Laser Technologies Co Ltd
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Xian Bright Laser Technologies 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
    • C23C22/54—Treatment of refractory metals or alloys based thereon

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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)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)

Abstract

本发明公开了一种提升钛合金在硫酸溶液中耐蚀性的方法，采用腐蚀失重试验提升增材制造钛合金在硫酸溶液中的耐蚀性，具体过程为：将钛合金制件在含一定浓度的Fe3+的44.6％的硫酸溶液中在一定的温度下浸泡一定的时间。本发明的一种提升钛合金在硫酸溶液中耐蚀性的方法，解决了现有技术中存在的钛合金制件在硫酸中易腐蚀的问题。

Description

一种提升钛合金在硫酸溶液中耐蚀性的方法
技术领域
本发明属于提高钛合金耐蚀性方法技术领域，涉及一种提升钛合金在硫酸溶液中耐蚀性的方法。
背景技术
钛合金在强腐蚀环境中所显示出的优异的化学稳定性以及在电解质中强的自钝化能力使得其被广泛的应用于石油、化工、航天等各个领域。但是目前已有研究表明增材制造钛合金制件在还原性酸如硫酸、盐酸中均不耐蚀，尤其在中度硫酸中会发生去钝化行为，表面的钝化膜受损进而发生溶解失稳，导致构件在服役过程中腐蚀失效。
发明内容
本发明的目的是提供一种提升钛合金在硫酸溶液中耐蚀性的方法，解决了现有技术中存在的钛合金制件在硫酸中易腐蚀的问题。
本发明所采用的技术方案是，一种提升钛合金在硫酸溶液中耐蚀性的方法，采用腐蚀失重试验提升增材制造钛合金在硫酸溶液中的耐蚀性，具体过程为：将钛合金制件在含一定浓度的Fe3+的44.6％的硫酸溶液中在一定的温度下浸泡一定的时间。
本发明的特征还在于，
44.6％的硫酸溶液中Fe3+的浓度为0.001mol/L～0.1mol/L。
44.6％的硫酸溶液中Fe3+的浓度为0.001mol/L、0.005mol/L、0.01mol/L、0.05mol/L、0.1mol/L。
将钛合金制件在含一定浓度的Fe3+的44.6％的硫酸溶液中在25℃浸泡168h。
本发明的有益效果是：
本发明通过将将钛合金制件在含一定浓度的Fe3+的44.6％的硫酸溶液中浸泡一定的时间，能有效降低钛合金制件在硫酸溶液中的腐蚀速率。
附图说明
图1是本发明实施例中TC4在不同浓度的Fe3+的44.6％的硫酸溶液中浸泡后的腐蚀速率曲线图。
具体实施方式
下面结合附图和具体实施方式对本发明进行详细说明。
本发明一种提升钛合金在硫酸溶液中耐蚀性的方法，采用腐蚀失重试验提升增材制造钛合金在硫酸溶液中的耐蚀性，具体过程为：将钛合金制件在含一定浓度的Fe3+的44.6％的硫酸溶液中在一定的温度下浸泡一定的时间；其中：44.6％的硫酸溶液中Fe3+的浓度为0.001mol/L～0.1mol/L。
优选地，44.6％的硫酸溶液中Fe3+的浓度为0.001mol/L、0.005mol/L、0.01mol/L、0.05mol/L、0.1mol/L。
优选地，将钛合金制件在含一定浓度的Fe3+的44.6％的硫酸溶液中在25℃浸泡168h。
为验证本发明方法的有效性，实验如下：
步骤1，腐蚀失重实验
选取增材制造钛合金制件TC4，成分见表1，浸泡试样为24mm×30mm×3mm标准实验规格，将试样浸泡在含有不同的浓度Fe3+的硫酸溶液中，Fe3+浓度分别为0.001mol/L、0.005mol/L、0.01mol/L、0.05mol/L、0.1mol/L，168h后取出试样，清洗、干燥后称量；
表1 TC4化学成分
步骤1.2，在不同介质中，对TC4进行浸泡腐蚀实验，采用失重法计算材料的腐蚀速率，计算结果如表2所示，并且由表数据作图1所示。
表2 TC4在不同浓度Fe3+的硫酸液中浸泡腐蚀的腐蚀速率(μm/a)
介质 腐蚀速率/
44.6％硫酸 1783.89
44.6％硫酸+0.001mol/L 1326.27
44.6％硫酸+0.005mol/L 18.28
44.6％硫酸+0.01mol/L 8.45
44.6％硫酸+0.05mol/L 10.94
44.6％硫酸+0.1mol/L 9.57
从图1和表1可以看出，经浸泡后的TC4腐蚀速率明显变慢，且在Fe3+的浓度为0.01mol/L的44.6％硫酸溶液中浸泡后的腐蚀速率最低。

Claims (4)

1.一种提升钛合金在硫酸溶液中耐蚀性的方法，其特征在于，采用腐蚀失重试验提升增材制造钛合金在硫酸溶液中的耐蚀性，具体过程为：将钛合金制件在含一定浓度的Fe3+的44.6％的硫酸溶液中在一定的温度下浸泡一定的时间。
2.根据权利要求1所述的一种提升钛合金在硫酸溶液中耐蚀性的方法，其特征在于，所述44.6％的硫酸溶液中Fe3+的浓度为0.001mol/L～0.1mol/L。
3.根据权利要求2所述所述的一种提升钛合金在硫酸溶液中耐蚀性的方法，其特征在于，所述44.6％的硫酸溶液中Fe3+的浓度为0.001mol/L、0.005mol/L、0.01mol/L、0.05mol/L、0.1mol/L。
4.根据权利要求2所述所述的一种提升钛合金在硫酸溶液中耐蚀性的方法，其特征在于，将钛合金制件在含一定浓度的Fe3+的44.6％的硫酸溶液中在25℃浸泡168h。
CN201811564461.6A 2018-12-20 2018-12-20 一种提升钛合金在硫酸溶液中耐蚀性的方法 Withdrawn CN109652791A (zh)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0592892A1 (en) * 1992-10-12 1994-04-20 Itb S.R.L. Process for continuous titanium sheet pickling and passivation without using nitric acid
CN101709474A (zh) * 2009-11-26 2010-05-19 攀钢集团江油长城特殊钢有限公司 一种钛合金的碱酸洗方法
CN103215579A (zh) * 2013-04-18 2013-07-24 沈阳理工大学 一种钛合金表面化学发黑的方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0592892A1 (en) * 1992-10-12 1994-04-20 Itb S.R.L. Process for continuous titanium sheet pickling and passivation without using nitric acid
CN101709474A (zh) * 2009-11-26 2010-05-19 攀钢集团江油长城特殊钢有限公司 一种钛合金的碱酸洗方法
CN103215579A (zh) * 2013-04-18 2013-07-24 沈阳理工大学 一种钛合金表面化学发黑的方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
王雷等: "硫酸溶液中Fe3+对TC4腐蚀行为的影响", 《腐蚀与防护》 *

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