JP7235254B2 - Mg-Al-Ca系合金の表面改質方法 - Google Patents
Mg-Al-Ca系合金の表面改質方法 Download PDFInfo
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- JP7235254B2 JP7235254B2 JP2021066468A JP2021066468A JP7235254B2 JP 7235254 B2 JP7235254 B2 JP 7235254B2 JP 2021066468 A JP2021066468 A JP 2021066468A JP 2021066468 A JP2021066468 A JP 2021066468A JP 7235254 B2 JP7235254 B2 JP 7235254B2
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
- C22C23/02—Alloys based on magnesium with aluminium as the next major constituent
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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
- C23C22/60—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 alkaline aqueous solutions with pH greater than 8
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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
- C23C22/60—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 alkaline aqueous solutions with pH greater than 8
- C23C22/66—Treatment of aluminium or alloys based thereon
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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
- C23C22/82—After-treatment
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- Other Surface Treatments For Metallic Materials (AREA)
- Chemical Treatment Of Metals (AREA)
Description
化成処理では、被処理材金属の表面に化学処理剤を作用させ、化学的に酸化被膜を形成させる。陽極酸化処理では、被処理材金属を陽極として、専用の電解液中で通電し、電気化学的に酸化被膜を生成させる。
本実施形態に係るMg-Al-Ca系合金の表面改質方法は、アルカリ処理工程と、レーザ光照射工程とを含む。
Mg-Al-Ca系合金をアルカリ溶液に所定時間、浸漬させる。これにより、Mg-Al-Ca系合金の表面上に、Mg(OH)2被膜が形成される。
アルカリ溶液には、化学成分として水1L中の質量に換算して、NaClが0.001g以上300g以下含まれ得る。
アルカリ溶液には、化学成分として水1L中の質量に換算して、MgCl2 が0g以上400g以下含まれ得る。
アルカリ溶液には、化学成分として水1L中の質量に換算して、NaOHが0g以上500g以下含まれ得る。
(1)3≦a≦7
(2)4.5≦b≦12(好ましくは8≦b≦12)
(3)1.2≦b/a≦3.0
(4)0<k≦0.3(好ましくは0.01≦k≦0.05)
(5)10≦c≦35(好ましくは10≦b≦35)
(6)0.05≦x≦0.3(好ましくは0.05≦x≦0.1)
レーザ加工装置を用いて、アルカリ処理したMg-Al-Ca系合金に、レーザ光を照射する。レーザ光は、パワー密度60W/mm2以下、入熱量5mJ以下にて照射される。入熱量は0.3mJ以上4mJ以下、さらには1mJ以上4mJ以下であることが好ましい。
上記実施形態に従って、Mg-Al-Ca系合金の試験片を表面改質した。
アルカリ溶液:化学成分として水1L中の質量に換算して、Mg(OH)2:0.012gを含む水溶液
図2および図3に、パワー密度と掘込深さとの関係を示す。図3は、図2の拡大図である。図2,3において、横軸はパワー密度(W/mm2)、縦軸は堀込深さ(μm)、〇はアルカリ浸漬時間が60分の試験片、●はアルカリ浸漬時間10分の試験片である。
上記試験No.16からNo.19の試験片を、1質量%NaCl水溶液に168時間浸漬させた後、腐食速度を算出した。
Cr=87600・ΔW(重量変化)/(A・t・r)・・・(1)
Cr:腐食速度(mm/year)
ΔW:試験前後の重量変化(g) r:試験片のの密度(g/cm-3)
A:試験片の初期表面積(cm2)
t:浸漬時間(hr)
以上説明した実施形態に記載のMg-Al-Ca系合金の表面改質方法は、例えば以下のように把握される。
Claims (6)
- Mg-Al-Ca系合金をアルカリ溶液に浸漬させ、
前記アルカリ溶液から取り出した後の前記Mg-Al-Ca系合金の表面に、パワー密度60W/mm2以下、入熱量5mJ以下にてレーザ光を照射するMg-Al-Ca系合金の表面改質方法。 - 前記入熱量を0.3mJ以上4mJ以下にする請求項1に記載のMg-Al-Ca系合金の表面改質方法。
- 前記パワー密度を53.2W/mm2以下とする請求項2に記載のMg-Al-Ca系合金の表面改質方法。
- 前記パワー密度を15.9W/mm2以下とする請求項2に記載のMg-Al-Ca系合金の表面改質方法。
- 前記パワー密度を3.3W/mm2以上とする請求項2に記載のMg-Al-Ca系合金の表面改質方法。
- 前記浸漬させる時間を10分以上120分以下とする請求項1~5のいずれかに記載のMg-Al-Ca系合金の表面改質方法。
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JP2021066468A JP7235254B2 (ja) | 2021-04-09 | 2021-04-09 | Mg-Al-Ca系合金の表面改質方法 |
EP21204425.9A EP4071272A1 (en) | 2021-04-09 | 2021-10-25 | Surface modification method of mg-al-ca based alloy |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008291310A (ja) | 2007-05-24 | 2008-12-04 | Kumamoto Univ | マグネシウム材の製造方法 |
JP2011012318A (ja) | 2009-07-03 | 2011-01-20 | Nissan Motor Co Ltd | マグネシウム合金部材 |
JP2012097340A (ja) | 2010-11-04 | 2012-05-24 | Mitsui Mining & Smelting Co Ltd | マグネシウム合金の表面処理方法 |
CN106676352A (zh) | 2016-12-06 | 2017-05-17 | 湖南大学 | 一种低成本、高性能的高Ca/Al比Mg‑XAl‑YCa‑ZZn合金及制备方法 |
CN108677039A (zh) | 2018-04-04 | 2018-10-19 | 深圳万佳互动科技有限公司 | 一种激光表面处理的镁铝合金 |
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US10138535B2 (en) * | 2013-10-23 | 2018-11-27 | National University Corporation Kumamoto University | Magnesium alloy and method of manufacturing same |
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- 2021-04-09 JP JP2021066468A patent/JP7235254B2/ja active Active
- 2021-10-25 EP EP21204425.9A patent/EP4071272A1/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008291310A (ja) | 2007-05-24 | 2008-12-04 | Kumamoto Univ | マグネシウム材の製造方法 |
JP2011012318A (ja) | 2009-07-03 | 2011-01-20 | Nissan Motor Co Ltd | マグネシウム合金部材 |
JP2012097340A (ja) | 2010-11-04 | 2012-05-24 | Mitsui Mining & Smelting Co Ltd | マグネシウム合金の表面処理方法 |
CN106676352A (zh) | 2016-12-06 | 2017-05-17 | 湖南大学 | 一种低成本、高性能的高Ca/Al比Mg‑XAl‑YCa‑ZZn合金及制备方法 |
CN108677039A (zh) | 2018-04-04 | 2018-10-19 | 深圳万佳互动科技有限公司 | 一种激光表面处理的镁铝合金 |
Non-Patent Citations (3)
Title |
---|
山崎 倫昭,Mg合金表面へのレーザー照射による高耐食Mg皮膜形成,FORM TECH REVIEW,28巻,日本,2018年,p.71-74 |
山崎 倫昭,レーザー照射によるマグネシウム合金の表面改質とその耐食性,日本金属学会講演概要,2006年春季(第138回)大会,日本,社団法人 日本金属学会,2006年03月21日,p.115 |
秋山 茂,Ca添加による難燃性Mg合金,鋳物,日本,1994年,Vol.66 No.1,p.38-42 |
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EP4071272A1 (en) | 2022-10-12 |
JP2022161559A (ja) | 2022-10-21 |
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