CN101665944A - 一种高电流效率Mg-Mn-Ca-Zn-Sr牺牲阳极 - Google Patents
一种高电流效率Mg-Mn-Ca-Zn-Sr牺牲阳极 Download PDFInfo
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- CN101665944A CN101665944A CN200810139387A CN200810139387A CN101665944A CN 101665944 A CN101665944 A CN 101665944A CN 200810139387 A CN200810139387 A CN 200810139387A CN 200810139387 A CN200810139387 A CN 200810139387A CN 101665944 A CN101665944 A CN 101665944A
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- 229910052791 calcium Inorganic materials 0.000 claims abstract description 10
- 229910052742 iron Inorganic materials 0.000 claims abstract description 9
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 9
- 229910052802 copper Inorganic materials 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 abstract description 18
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract description 15
- 229910052749 magnesium Inorganic materials 0.000 abstract description 15
- 229910052748 manganese Inorganic materials 0.000 abstract description 9
- 229910052712 strontium Inorganic materials 0.000 abstract description 4
- 238000004090 dissolution Methods 0.000 abstract description 3
- 239000011573 trace mineral Substances 0.000 abstract description 2
- 235000013619 trace mineral Nutrition 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract 1
- 239000011572 manganese Substances 0.000 description 13
- 230000007797 corrosion Effects 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 239000011701 zinc Substances 0.000 description 8
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 7
- 229910000861 Mg alloy Inorganic materials 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 239000012535 impurity Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 3
- 229910052788 barium Inorganic materials 0.000 description 2
- 229910002551 Fe-Mn Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910001278 Sr alloy Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
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- Prevention Of Electric Corrosion (AREA)
Abstract
一种高电流效率Mg－Mn－Ca－Zn－Sr牺牲阳极，属于牺牲阳极技术领域，其特征是，其材质以元素计由下列重量百分比的元素组成：Mn0.93％，Ca 0.13％，Zn 0.05％，Sr0.07％，Si＜0.045％，Cu＜0.018％，Ni＜0.001％，Fe＜0.030％，余量为Mg。本发明针对传统镁阳极电流效率不高的缺点，通过微量元素加入，增加镁阳极溶解均匀性和耐腐蚀性，提高镁阳极的电流效率。
Description
技术领域
本发明属于牺牲阳极技术领域，具体涉及一种高电流效率Mg-Mn-Ca-Zn-Sr牺牲阳极。
背景技术
电化学保护是防止金属腐蚀的最重要的方法之一，它利用外部电流使被腐蚀金属电位发生变化从而减缓或者抑制金属的腐蚀。向金属表面通足够的阳极电流，使金属发生阳极极化即电位变正并处于钝化状态，金属溶解大为减缓，称为阳极保护。目前研制成功并被广泛应用的牺牲阳极材料有三大类：镁阳极、锌阳极和铝阳极。
《AZ63B镁牺牲阳极的电化学性能研究》(青海师范大学学报(自然科学版)范燕青，王建朝，赵斌，2003年第1期)公开了一种镁阳极，其阳极阳泥的成份是：Al 6.2％，Zn 3.4％，Mn0.52％，Fe＜0.005，Ni＜0.003，Cu＜0.020，Si＜0.1，其余为镁。
《AZ63镁合金牺牲阳极的研究进展》(《装备环境工程》2007年6月第4卷第3期苏鹏，杜翠微等)公开了部分牌号的镁阳极的化学成份，见下表：
另外，《Ca和Ba对镁合金AZ63的燃点与熔体粘度的影响》(《铸造技术》2005年11月Vol.26NO.11崔红卫，刘俊成，耿浩然)发现，随着Ca或Ba量的增加，镁合金的燃点逐渐增大；加1.5％Ca的燃点比不增加Ca时提高了54K；在Ba量为0.3％时，比不加Ba时燃点提高67K。
发明内容
本发明的目的是针对传统镁阳极电流效率不高的缺点，通过微量元素加入，增加镁阳极溶解均匀性和耐腐蚀性，提高镁阳极的电流效率。
本发明具体采用如下技术方案：
一种高电流效率Mg-Mn-Ca-Zn-Sr牺牲阳极，其特征是，其材质以元素计由下列重量百分比的元素组成：
Mn0.93％，Ca 0.13％，Zn 0.05％，Sr0.07％，Si＜0.045％，Cu＜0.018％，Ni＜0.001％，Fe＜0.030％，余量为Mg。
所述牺牲阳极电流效率大于60％，工作电位为-1.65V～1.7V。
优选的是，所述牺牲阳极电流效率为65％。
本发明的牺牲阳极可按照现有技术的方法制备。
本发明的机理是：
1)加入Ca和Sr，降低晶间腐蚀提高效率。加入Ca和Sr后使合金晶粒细化，从而降低了晶间腐蚀倾向，减少了晶粒的剥落，使合金的溶解变得均匀。这是Mg-Mn-Ca-Sr合金具有较优电化学性能的主要原因。
2)加入Zn，主要是因为锌降低了Fe、Ni等杂质的危害，降低镁腐蚀速率减小了负差异效应，锌的添加可以提高合金的抗海水腐蚀的能力。
3)加入锰Mn，锰易同有害杂质元素化合，从而消除了Fe、Si对合金耐腐蚀性能的影响，使腐蚀速率大大降低。锰是控制镁中杂质的一种很有效的净化元素，可消除杂质的不良影响，降低镁的自腐蚀速度。在镁合金熔炼过程中，锰与铁能生成比较大的Fe-Mn化合物而沉积于溶体底部，而残留在合金中的铁则溶解于锰中或被锰所包围，不产生阴极杂质的有害作用。但Mn在镁合金中有偏析现象，过量的Mn反而会造成合金耐蚀性及塑性的下降，为此本配方将Mn控制在0.93％。锰的另外一个作用是使Mg-Mn阳极在腐蚀溶解时，在镁合金表面形成比氢氧化镁膜更具保护作用的水化二氧化锰膜，使析氢作用进一步减弱。
具体实施方式
实施例
1)牺牲阳极的化学成份以元素计由下列重量百分比的元素组成：Mn0.93％，Ca 0.13％，Zn 0.05％，Sr0.07％，Si＜0.045％，Cu＜0.018％，Ni＜0.001％，Fe＜0.030％，余量为Mg。
所述牺牲阳极电流效率为65％，工作电位为-1.65V～1.7V。
2)制法：在熔融的镁溶液中按比例加入金属Zn、Ca、Sr、Mn的卤化物，然后成型制得。
Claims (3)
1.一种高电流效率Mg-Mn-Ca-Zn-Sr牺牲阳极，其特征是，其材质以元素计由下列重量百分比的元素组成：
Mn0.93％，Ca 0.13％，Zn 0.05％，Sr0.07％，Si＜0.045％，Cu＜0.018％，Ni＜0.001％，Fe＜0.030％，余量为Mg。
2.根据权利要求1所述的高电流效率Mg-Mn-Ca-Zn-Sr牺牲阳极，其特征是，所述牺牲阳极电流效率大于60％，工作电位为-1.65V～1.7V。
3.根据权利要求2所述的高电流效率Mg-Mn-Ca-Zn-Sr牺牲阳极，其特征是，所述牺牲阳极电流效率为65％。
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| FR3030479A1 (fr) * | 2014-12-23 | 2016-06-24 | Seb Sa | Installation et procede de mineralisation d'une boisson aqueuse |
| CN114134507A (zh) * | 2021-11-29 | 2022-03-04 | 牡丹江市新翔石油机械有限责任公司 | 一种镁合金及其牺牲阳极器及其油套管电位防腐装置 |
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| US2805198A (en) * | 1956-02-29 | 1957-09-03 | Dow Chemical Co | Cathodic protection system and anode therefor |
| KR20000050896A (ko) * | 1999-01-15 | 2000-08-05 | 박호군 | Ｍｇ-Ｃａ 희생양극 |
| CN1210424C (zh) * | 2002-06-12 | 2005-07-13 | 沈阳工业大学 | 一种含Nd－Sr铸造镁合金及其制备方法 |
| CN100432295C (zh) * | 2006-03-22 | 2008-11-12 | 西安建筑科技大学 | 铝镁系牺牲阳极材料 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3030479A1 (fr) * | 2014-12-23 | 2016-06-24 | Seb Sa | Installation et procede de mineralisation d'une boisson aqueuse |
| CN114134507A (zh) * | 2021-11-29 | 2022-03-04 | 牡丹江市新翔石油机械有限责任公司 | 一种镁合金及其牺牲阳极器及其油套管电位防腐装置 |
| CN114134507B (zh) * | 2021-11-29 | 2022-08-02 | 牡丹江市新翔石油机械有限责任公司 | 一种镁合金及其牺牲阳极器及其油套管电位防腐装置 |
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