JP2002235185A - Discoloration inhibitor for magnesium alloy - Google Patents
Discoloration inhibitor for magnesium alloyInfo
- Publication number
- JP2002235185A JP2002235185A JP2001029881A JP2001029881A JP2002235185A JP 2002235185 A JP2002235185 A JP 2002235185A JP 2001029881 A JP2001029881 A JP 2001029881A JP 2001029881 A JP2001029881 A JP 2001029881A JP 2002235185 A JP2002235185 A JP 2002235185A
- Authority
- JP
- Japan
- Prior art keywords
- magnesium alloy
- discoloration
- water
- methyl
- propanol
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電子機器のフレー
ム等に用いられるマグネシウム合金を加工する際、その
表面の変色を防止するために使用される変色防止剤に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discoloration inhibitor used to prevent discoloration of the surface of a magnesium alloy used for a frame of an electronic device when processing the alloy.
【０００２】[0002]
【従来の技術】マグネシウム合金は、軽量で強度が大き
く、機械的な加工を容易に施すことができ、さらに電磁
波の遮蔽性に極めて優れ、リサイクル性がよいので、携
帯電話やコンピュータの電子機器のフレームをはじめ自
動車の部品等の素材として用いられている。2. Description of the Related Art Magnesium alloys are lightweight, have high strength, can be easily subjected to mechanical processing, are extremely excellent in shielding electromagnetic waves, and have good recyclability. It is used as a material for parts such as frames and automobiles.
【０００３】このフレーム等の加工物は、マグネシウム
合金に含水の切削液をかけながら旋盤で合金に切削や研
削を施したり、その後にばりを除去するため砥粒の含水
懸濁液と加工物とを樽に入れて回転させるバレル研磨を
施したりすることにより、得られる。この際、加工物の
表面が直ぐに変色してしまうという問題があった。[0003] A workpiece such as a frame is formed by cutting or grinding the alloy with a lathe while applying a cutting fluid containing water to the magnesium alloy, and then removing the burrs with a water-containing suspension of abrasive grains and a workpiece. By subjecting it to barrel kneading and rotating the barrel. At this time, there is a problem that the surface of the workpiece is discolored immediately.
【０００４】この加工物は、マグネシウム合金の切削等
により新たに露出した表面の原子と空気中の酸素とが水
を触媒として容易に反応し、その表面に酸化被膜が直ぐ
に形成されるので、変色するものと考えられる。[0004] In this work, discoloration occurs because atoms on the surface newly exposed by cutting of a magnesium alloy and the oxygen in the air easily react with water as a catalyst and an oxide film is formed immediately on the surface. It is thought to be.
【０００５】一方、水を用いないで、マグネシウム合金
に切削や研削やバレル研磨を施すと、潤滑が悪いためそ
の作業効率が低下するうえ、冷却が不十分となりマグネ
シウム合金の発火の虞があり危険である。On the other hand, if the magnesium alloy is subjected to cutting, grinding, or barrel polishing without using water, the lubrication is poor and the work efficiency is reduced, and the cooling is insufficient and the magnesium alloy may be ignited. It is.
【０００６】[0006]
【発明が解決しようとする課題】本発明は前記の課題を
解決するためなされたもので、安全かつ効率よくマグネ
シウム合金の研削や切削やバレル研磨を施すことがで
き、その表面を防錆して変色を防ぐことのできるマグネ
シウム合金の変色防止剤を提供することを目的とする。DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and can perform grinding, cutting, or barrel polishing of a magnesium alloy safely and efficiently. An object of the present invention is to provide a discoloration inhibitor for a magnesium alloy that can prevent discoloration.
【０００７】[0007]
【課題を解決するための手段】前記の目的を達成するた
めになされた本発明のマグネシウム合金の変色防止剤
は、少なくとも２−アミノ−２−メチル−１−プロパノ
ールを含んでいる水溶性アミンが、有効成分である。DISCLOSURE OF THE INVENTION In order to achieve the above object, the present invention provides a magnesium alloy discoloration inhibitor comprising a water-soluble amine containing at least 2-amino-2-methyl-1-propanol. , An active ingredient.
【０００８】水溶性アミンには、２−アミノ−２−メチ
ル−１−プロパノールの他に、モノエタノールアミン、
ジエタノールアミン、トリエタノールアミン、モノプロ
パノールアミン、ジプロパノールアミン、トリプロパノ
ールアミン、モノブタノールアミン、ジブタノールアミ
ン、トリブタノールアミン、Ｎ−メチル−２−アミノエ
タノール、Ｎ，Ｎ−ジメチル−２−アミノエタノール、
Ｎ−エチル−２−アミノエタノール、Ｎ，Ｎ−ジエチル
−２−アミノエタノール、および／またはピペラジンが
含まれていてもよい。水溶性アミンにこれらの化合物の
複数が含まれていてもよく、任意の割合で含まれていて
もよい。これらの化合物が含まれていると、水溶性アミ
ンが２−アミノ−２−メチル−１−プロパノールのみで
ある場合に比べ、相乗効果により変色防止作用が一層向
上する。中でも、ジエタノールアミン、トリエタノール
アミンであると一層好ましい。The water-soluble amines include, in addition to 2-amino-2-methyl-1-propanol, monoethanolamine,
Diethanolamine, triethanolamine, monopropanolamine, dipropanolamine, tripropanolamine, monobutanolamine, dibutanolamine, tributanolamine, N-methyl-2-aminoethanol, N, N-dimethyl-2-aminoethanol,
N-ethyl-2-aminoethanol, N, N-diethyl-2-aminoethanol, and / or piperazine may be included. A plurality of these compounds may be contained in the water-soluble amine, and may be contained in an arbitrary ratio. When these compounds are contained, the discoloration preventing effect is further improved by a synergistic effect as compared with the case where the water-soluble amine is only 2-amino-2-methyl-1-propanol. Among them, diethanolamine and triethanolamine are more preferable.
【０００９】水溶性アミン中に、前記２−アミノ−２−
メチル−１−プロパノールが重量比で１０％以上含まれ
ていることが好ましい。１０％より少ないと、変色を十
分に防止できない。水溶性アミン中に、２−アミノ−２
−メチル−１−プロパノールが重量比で３０〜７０％含
まれていると一層好ましい。[0009] In the water-soluble amine, 2-amino-2-
It is preferable that methyl-1-propanol be contained in an amount of 10% or more by weight. If it is less than 10%, discoloration cannot be sufficiently prevented. 2-amino-2 in a water-soluble amine
More preferably, 30-70% by weight of -methyl-1-propanol is contained.
【００１０】このマグネシウム合金の変色防止剤には補
助変色抑制成分として、非鉄金属用変色抑制剤例えばベ
ンゾトリアゾールやメチルベンゾトリアゾールが含まれ
ていてもよく、アルカリ金属水酸化物例えば苛性ソー
ダ、アルカリ金属炭酸塩例えば炭酸ソーダ、アルカリ金
属モリブデン酸塩例えばモリブデン酸ソーダ、アルカリ
金属リン酸塩例えばリン酸ソーダが含まれていてもよ
い。The discoloration inhibitor of the magnesium alloy may contain a discoloration inhibitor for non-ferrous metals, such as benzotriazole or methylbenzotriazole, as an auxiliary discoloration inhibitor, and an alkali metal hydroxide such as caustic soda, alkali metal carbonate, or the like. Salts such as sodium carbonate, alkali metal molybdates such as sodium molybdate, alkali metal phosphates such as sodium phosphate may be included.
【００１１】なお、このマグネシウム合金の変色防止剤
は、保存または流通の際には、水で希釈される。このと
き水溶性アミンを約４０重量％含む水溶液とすることが
好ましい。The discoloration inhibitor for the magnesium alloy is diluted with water during storage or distribution. At this time, it is preferable to use an aqueous solution containing about 40% by weight of a water-soluble amine.
【００１２】本発明のマグネシウム合金加工用潤滑液
は、マグネシウム合金の変色防止剤を含み、加工用潤滑
液中この水溶性アミンの濃度が０．０５〜１０重量％で
ある。この範囲よりも薄いと十分に変色を防止すること
ができない。この範囲より濃くても濃度に見合う効果が
得られず、高価な２−アミノ−２−メチル−１−プロパ
ノールを単に過剰に用いることとなってしまう。The lubricating fluid for processing a magnesium alloy of the present invention contains a discoloration inhibitor for a magnesium alloy, and the concentration of the water-soluble amine in the lubricating liquid for processing is 0.05 to 10% by weight. If the thickness is less than this range, discoloration cannot be sufficiently prevented. If the concentration is higher than this range, the effect corresponding to the concentration cannot be obtained, and expensive 2-amino-2-methyl-1-propanol is simply used in excess.
【００１３】またマグネシウム合金加工用潤滑液は、マ
グネシウム合金の変色防止剤が水で希釈されて、水溶性
アミンの濃度を０．０５〜１０重量％としたものであっ
てもよい。水溶性アミンが２−アミノ−２−メチル−１
−プロパノールのみであるときには、その濃度は、０．
１〜１０重量％であることが好ましく、０．５〜５重量
％であると一層好ましい。また、水溶性アミンが２−ア
ミノ−２−メチル−１−プロパノールと、その他にモノ
エタノールアミン等の前記の化合物とを含んでいるとき
のこれらの濃度は、合計で０．０５〜５重量％であるこ
とが好ましく、０．５〜２重量％であると一層好まし
い。The lubricating fluid for processing a magnesium alloy may be one in which a discoloration inhibitor for the magnesium alloy is diluted with water to make the concentration of the water-soluble amine 0.05 to 10% by weight. The water-soluble amine is 2-amino-2-methyl-1
When only propanol is used, the concentration is
It is preferably from 1 to 10% by weight, more preferably from 0.5 to 5% by weight. When the water-soluble amine contains 2-amino-2-methyl-1-propanol and the above-mentioned compound such as monoethanolamine, the concentration thereof is 0.05 to 5% by weight in total. And more preferably 0.5 to 2% by weight.
【００１４】本発明のマグネシウム合金加工方法は、マ
グネシウム合金加工用潤滑液を用いて、マグネシウム合
金を切削または研削または研磨するというものである。
例えば、旋盤でマグネシウム合金にこの潤滑液をかけな
がら切削や研削を施したり、バレル研磨の際に樽へこの
潤滑液を入れて研磨を施したりするというものである。According to the method for machining a magnesium alloy of the present invention, a magnesium alloy is cut, ground or polished using a lubricating liquid for machining a magnesium alloy.
For example, cutting or grinding is performed while applying the lubricating liquid to the magnesium alloy using a lathe, or the barrel is polished by pouring the lubricating liquid into a barrel during polishing.
【００１５】この潤滑液を用いてマグネシウム合金の切
削や研削や研磨を施すと、合金の変色が防止される機構
については、その詳細が明らかでないが、２−アミノ−
２−メチル−１−プロパノールの作用によって、マグネ
シウム合金の表面にある種の防食被膜が形成されるため
であると考えられる。The mechanism by which the discoloration of the magnesium alloy is prevented when the magnesium alloy is cut, ground or polished by using this lubricating liquid is not clear, but it is not clear.
It is considered that a certain kind of anti-corrosion film is formed on the surface of the magnesium alloy by the action of 2-methyl-1-propanol.
【００１６】このマグネシウム合金加工方法によれば、
マグネシウム合金、例えば汎用されているアルミニウム
−マグネシウム合金の他、種々の成分のマグネシウム合
金、具体的にはＪＩＳ規格のマグネシウム合金板ＭＰ
１、ＭＰ４、ＭＰ５、ＭＰ７やマグネシウム合金押出形
材ＭＳ１〜ＭＳ６、ＡＳＴＭ規格のＡＺ−９１に対し、
切削や研削や研磨を施すことができる。According to this magnesium alloy processing method,
Magnesium alloys, for example, commonly used aluminum-magnesium alloys, as well as magnesium alloys of various components, specifically, JIS-standard magnesium alloy plates MP
1, MP4, MP5, MP7 and magnesium alloy extruded profiles MS1-MS6, ASTM standard AZ-91,
Cutting, grinding and polishing can be performed.
【００１７】[0017]
【実施例】以下、本発明のマグネシウム合金の変色防止
剤、およびマグネシウム合金加工用潤滑液の実施例につ
いて詳細に説明する。本発明を適用するマグネシウム合
金加工用潤滑液の調製例を実施例１〜８に示す。また本
発明を適用外の潤滑液の調製例を比較例１〜１１に示
す。EXAMPLES Examples of the discoloration inhibitor for magnesium alloy and the lubricating liquid for processing magnesium alloy of the present invention will be described in detail below. Examples 1 to 8 show preparation examples of a lubricating liquid for processing a magnesium alloy to which the present invention is applied. Preparation examples of lubricating liquids to which the present invention is not applied are shown in Comparative Examples 1 to 11.
【００１８】（実施例１〜８）表１に記載の量の水溶性
アミンを水で希釈し、同表に記載の濃度のマグネシウム
合金加工用潤滑液を調製した。Examples 1 to 8 Water-soluble amines in the amounts shown in Table 1 were diluted with water to prepare lubricating fluids for processing magnesium alloys having the concentrations shown in the same table.
【００１９】（比較例１〜１１）比較例１〜１０では、
表１に記載の量の水溶性アミンを水で希釈し、同表に記
載の濃度の潤滑液を調製した。比較例１１では単なる水
を潤滑液とした。(Comparative Examples 1 to 11) In Comparative Examples 1 to 10,
The amount of water-soluble amine shown in Table 1 was diluted with water to prepare a lubricating liquid having the concentration shown in the same table. In Comparative Example 11, simple water was used as the lubricating liquid.
【００２０】なお、いずれも用いた水は、ｐＨ７．６
８、比電導度１５．５ｍｓ／ｍ、全硬度５５．０ Ｃａ
ＣＯ３・ｍｇ／Ｌ、塩素イオン濃度２１．０ｐｐｍ、硫
酸イオン濃度２０．０ｐｐｍの上水道水である。The water used was pH 7.6.
8, specific conductivity 15.5 ms / m, total hardness 55.0 Ca
It is tap water with a CO concentration of 3 mg / L, a chloride ion concentration of 21.0 ppm, and a sulfate ion concentration of 20.0 ppm.
【００２１】得られた実施例１〜８のマグネシウム合金
加工用潤滑液、および比較例１〜１１の潤滑液のそれぞ
れについて変色試験を行った。A discoloration test was performed on each of the obtained lubricants for processing magnesium alloys of Examples 1 to 8 and the lubricants of Comparative Examples 1 to 11.
【００２２】（変色試験１）巾３５ｍｍ長さ５０ｍｍ厚
さ２０ｍｍであってＡＳＴＭ規格ＡＺ−９１のマグネシ
ウム合金を、ＣＣ−２４０ペーパーにて表面光沢が得ら
れるまで研磨した後、アセトンで洗浄して、変色試験用
の小片とした。夫々の潤滑液の４００ｍＬを５００ｍＬ
のビーカーに採り、９０℃に加熱したこの潤滑液に変色
試験用の小片を１５分間浸漬した後、小片を取り出し
た。小片表面の変色の程度を観察し、変色が全くなかっ
たものを◎、極僅かに変色したものを○、やや変色した
ものを△、かなり変色したものを×、変色が激しかった
ものを××とする５段階で評価した結果を表１に示す。(Discoloration test 1) A magnesium alloy of 35 mm in width, 50 mm in length, 20 mm in thickness and ASTM standard AZ-91 is polished with CC-240 paper until a surface gloss is obtained, and then washed with acetone. And a small piece for a discoloration test. 400mL of each lubricating liquid to 500mL
And a small piece for a discoloration test was immersed in the lubricating liquid heated to 90 ° C. for 15 minutes, and then the small piece was taken out. Observing the degree of discoloration on the surface of the small pieces, ◎ indicates no discoloration, ○ indicates very slight discoloration, Δ indicates slightly discolored, × indicates considerable discoloration, and XX indicates severe discoloration. Table 1 shows the results of the evaluation in five steps.
【００２３】（変色試験２）夫々の潤滑液の４００ｍＬ
を５００ｍＬのビーカーに採り、３０℃に温めた潤滑液
に、変色試験１と同種の変色試験用小片を１５分間浸漬
した後、乾燥し、相対湿度１００％ＲＨのデシケータ中
に２０日間保管した。小片を取り出し、変色の程度を変
色試験１と同様に観察して評価した結果を表１に示す。(Discoloration test 2) 400 mL of each lubricating liquid
Was placed in a 500 mL beaker, and a small piece of a discoloration test similar to that of the discoloration test 1 was immersed in a lubricating liquid heated to 30 ° C. for 15 minutes, dried, and stored in a desiccator at a relative humidity of 100% RH for 20 days. Table 1 shows the results obtained by taking out the small pieces and observing and evaluating the degree of discoloration in the same manner as in the discoloration test 1.
【００２４】[0024]
【表１】 [Table 1]
【００２５】表１から明らかなとおり、本発明を適用す
る実施例１〜８のマグネシウム合金加工用潤滑液は、い
ずれも優れたマグネシウム合金の変色防止効果を発揮し
た。一方、比較例１〜３は２−アミノ−２−メチル−１
−プロパノールの量が少なすぎ、比較例４〜１１は２−
アミノ−２−メチル−１−プロパノールが含まれていな
いため、いずれもマグネシウム合金の表面が変色した。As is evident from Table 1, the lubricating fluids for working magnesium alloys of Examples 1 to 8 to which the present invention is applied all exhibited an excellent effect of preventing discoloration of magnesium alloys. On the other hand, Comparative Examples 1 to 3 were 2-amino-2-methyl-1
-The amount of propanol was too small, and Comparative Examples 4 to 11 showed 2-
Since no amino-2-methyl-1-propanol was contained, the surface of each magnesium alloy was discolored.
【００２６】[0026]
【発明の効果】以上、詳細に説明したように、本発明の
マグネシウム合金の変色防止剤は、マグネシウム合金の
切削や研削や研磨の加工の際に使用され、この合金の表
面を防錆して変色を防止することができる。As described above in detail, the discoloration preventive for magnesium alloy of the present invention is used in cutting, grinding and polishing of magnesium alloy, and is used to prevent rust on the surface of this alloy. Discoloration can be prevented.
【００２７】この変色防止剤を含んでいる潤滑液を用
い、安全かつ効率よくマグネシウム合金の研削や切削や
バレル研磨の加工を施すことができる。加工されたマグ
ネシウム合金は、表面が防錆されているので変色しな
い。そのため得られた加工品は品質が優れている。Using the lubricating liquid containing the discoloration inhibitor, the magnesium alloy can be safely and efficiently subjected to grinding, cutting, and barrel polishing. The processed magnesium alloy does not discolor because the surface is rustproof. Therefore, the obtained processed product is excellent in quality.
Claims (6)
１−プロパノールを含んでいる水溶性アミンが、有効成
分であるマグネシウム合金の変色防止剤。(1) at least 2-amino-2-methyl-
A water-soluble amine containing 1-propanol is a discoloration inhibitor for a magnesium alloy as an active ingredient.
２−メチル−１−プロパノールの他に、モノエタノール
アミン、ジエタノールアミン、トリエタノールアミン、
モノプロパノールアミン、ジプロパノールアミン、トリ
プロパノールアミン、モノブタノールアミン、ジブタノ
ールアミン、トリブタノールアミン、Ｎ−メチル−２−
アミノエタノール、Ｎ，Ｎ−ジメチル−２−アミノエタ
ノール、Ｎ−エチル−２−アミノエタノール、Ｎ，Ｎ−
ジエチル−２−アミノエタノール、および／またはピペ
ラジンが含まれていることを特徴とする請求項１に記載
のマグネシウム合金の変色防止剤。2. The water-soluble amine includes 2-amino-
In addition to 2-methyl-1-propanol, monoethanolamine, diethanolamine, triethanolamine,
Monopropanolamine, dipropanolamine, tripropanolamine, monobutanolamine, dibutanolamine, tributanolamine, N-methyl-2-
Aminoethanol, N, N-dimethyl-2-aminoethanol, N-ethyl-2-aminoethanol, N, N-
The discoloration inhibitor for a magnesium alloy according to claim 1, further comprising diethyl-2-aminoethanol and / or piperazine.
ノ−２−メチル−１−プロパノールが重量比で１０％以
上含まれていることを特徴とする請求項１に記載のマグ
ネシウム合金の変色防止剤。3. The discoloration of a magnesium alloy according to claim 1, wherein the water-soluble amine contains the 2-amino-2-methyl-1-propanol in a weight ratio of 10% or more. Inhibitor.
ム合金の変色防止剤を含み、該水溶性アミンの濃度が
０．０５〜１０重量％であることを特徴とするマグネシ
ウム合金加工用潤滑液。4. A lubricant for processing a magnesium alloy, comprising the discoloration inhibitor for a magnesium alloy according to claim 1 or 2, wherein the concentration of the water-soluble amine is 0.05 to 10% by weight.
水で希釈されたものであることを特徴とする請求項４に
記載のマグネシウム合金加工用潤滑液。5. The lubricating fluid according to claim 4, wherein the discoloration inhibitor for the magnesium alloy is diluted with water.
工用潤滑液を用いて、マグネシウム合金を切削または研
削または研磨することを特徴とするマグネシウム合金加
工方法。6. A method for processing a magnesium alloy, comprising cutting, grinding or polishing a magnesium alloy using the lubricant for processing a magnesium alloy according to claim 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001029881A JP4832650B2 (en) | 2001-02-06 | 2001-02-06 | Anti-discoloring agent for magnesium alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001029881A JP4832650B2 (en) | 2001-02-06 | 2001-02-06 | Anti-discoloring agent for magnesium alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002235185A true JP2002235185A (en) | 2002-08-23 |
| JP4832650B2 JP4832650B2 (en) | 2011-12-07 |
Family
ID=18894176
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001029881A Expired - Fee Related JP4832650B2 (en) | 2001-02-06 | 2001-02-06 | Anti-discoloring agent for magnesium alloy |
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| Country | Link |
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| JP (1) | JP4832650B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106479602A (en) * | 2007-05-08 | 2017-03-08 | 罗门哈斯公司 | Stable fluid |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6443598A (en) * | 1987-08-12 | 1989-02-15 | Yushiro Chem Ind | Water-soluble cutting oil |
| JPH09194872A (en) * | 1996-01-12 | 1997-07-29 | Yushiro Chem Ind Co Ltd | Water-soluble lubricant composition and method for inhibiting corrosion of metal |
-
2001
- 2001-02-06 JP JP2001029881A patent/JP4832650B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6443598A (en) * | 1987-08-12 | 1989-02-15 | Yushiro Chem Ind | Water-soluble cutting oil |
| JPH09194872A (en) * | 1996-01-12 | 1997-07-29 | Yushiro Chem Ind Co Ltd | Water-soluble lubricant composition and method for inhibiting corrosion of metal |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106479602A (en) * | 2007-05-08 | 2017-03-08 | 罗门哈斯公司 | Stable fluid |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4832650B2 (en) | 2011-12-07 |
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