JPS5893876A - Production of iron and steel products coated with colored rust preventive film - Google Patents
Production of iron and steel products coated with colored rust preventive filmInfo
- Publication number
- JPS5893876A JPS5893876A JP19159481A JP19159481A JPS5893876A JP S5893876 A JPS5893876 A JP S5893876A JP 19159481 A JP19159481 A JP 19159481A JP 19159481 A JP19159481 A JP 19159481A JP S5893876 A JPS5893876 A JP S5893876A
- Authority
- JP
- Japan
- Prior art keywords
- iron
- steel products
- sodium
- soln
- rust preventive
- 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.)
- Pending
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 20
- 239000010959 steel Substances 0.000 title claims abstract description 20
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 11
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 title claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 230000003449 preventive effect Effects 0.000 title abstract 3
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 claims abstract description 26
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims abstract description 14
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims abstract description 12
- 239000003518 caustics Substances 0.000 claims abstract description 10
- 239000001488 sodium phosphate Substances 0.000 claims abstract description 10
- 229910000162 sodium phosphate Inorganic materials 0.000 claims abstract description 10
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims abstract description 10
- 239000003513 alkali Substances 0.000 claims abstract description 7
- 235000010344 sodium nitrate Nutrition 0.000 claims abstract description 7
- 239000004317 sodium nitrate Substances 0.000 claims abstract description 7
- 235000010288 sodium nitrite Nutrition 0.000 claims abstract description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical class [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000009835 boiling Methods 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 claims abstract description 3
- 150000003839 salts Chemical class 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 5
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 239000010931 gold Substances 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 239000000243 solution Substances 0.000 claims 2
- 239000012670 alkaline solution Substances 0.000 claims 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract description 21
- 235000011121 sodium hydroxide Nutrition 0.000 abstract description 7
- YADSGOSSYOOKMP-UHFFFAOYSA-N dioxolead Chemical compound O=[Pb]=O YADSGOSSYOOKMP-UHFFFAOYSA-N 0.000 abstract description 2
- TVQLLNFANZSCGY-UHFFFAOYSA-N disodium;dioxido(oxo)tin Chemical compound [Na+].[Na+].[O-][Sn]([O-])=O TVQLLNFANZSCGY-UHFFFAOYSA-N 0.000 abstract description 2
- 229940079864 sodium stannate Drugs 0.000 abstract description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 9
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 235000011118 potassium hydroxide Nutrition 0.000 description 3
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 229910021626 Tin(II) chloride Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- XMFOQHDPRMAJNU-UHFFFAOYSA-N lead(ii,iv) oxide Chemical compound O1[Pb]O[Pb]11O[Pb]O1 XMFOQHDPRMAJNU-UHFFFAOYSA-N 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 239000012255 powdered metal Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- C23C22/62—Treatment of iron or alloys based thereon
Landscapes
- 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
Description
【発明の詳細な説明】
本発明は鉄鋼製品の表ＩＩＩ′ｉに四三酸化鉄被膜を法
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the method of applying a triiron tetroxide coating to steel products according to Table III'i.
従来鉄鋼製品の防錆着色法として特公昭４６−２６８４
３号発明（以下先行特許発明という）があるが、本発明
は先行特許発明の改良法に関するもので、本発明者が先
行特許発明を改良すべく鋭意研究した結果、有色防錆被
膜によって被覆された鉄鋼・製品の製造法において、先
行特許光１月よりも鉄鋼製品の表向における右色防鮪処
理の反応が一段と早く促進され、四三酸化鉄被膜の生成
が早くて美麗に有色され、四三酸化鉄被１１１すが均質
で依くて密有性がよいため防錆効果が大になるなどの種
々の効果を奏する本発明を完成するに至ったもので、本
発明は脱脂して洗浄した鉄鋼製品を４０〜５５重量％の
苛性アルカリ、好適には苛性ソーダ又は苛性カリ溶液に
五酸化燐又は燐酸ソーダ０．５〜１０重菫％（五酸化燐
換算値）及び／又は亜硝酸ンーグ５〜１５車重％及び硝
酸ンーグ３〜８重重％、更に金属鉄、好１しくに粉末状
金属鉄、錫の塩類と鉛の塩類とを主成分として添加した
処理液に浸漬して使用苛性アルカリ、溶液の６０点近く
までの温度に加熱して鉄鋼製品表向に有色防錆処理を施
して製造した泊色防錆被膜を被覆した鉄鋼製品の製造法
を提供するものである。Special Publication No. 46-2684 as a rust-preventive coloring method for conventional steel products
There is an invention No. 3 (hereinafter referred to as the prior patented invention), but the present invention relates to a method for improving the prior patented invention.As a result of the inventor's intensive research to improve the prior patented invention, the present invention is coated with a colored anti-rust coating. In the manufacturing method of steel and products, the reaction of the right color anti-tuna treatment on the surface of steel products is accelerated more quickly than in the prior patent light January, and the formation of triiron tetroxide film is faster and beautifully colored. The present invention has been completed, which has various effects such as a greater rust prevention effect because the 111 triiron tetroxide coating is homogeneous and has good adhesion. The washed steel products are mixed with 40 to 55% by weight of a caustic alkali, preferably caustic soda or caustic potash solution, and 0.5 to 10% of phosphorus pentoxide or sodium phosphate (calculated as phosphorus pentoxide) and/or 5% nitrous acid. Caustic alkali used by immersing it in a treatment solution containing ~15% vehicle weight, 3~8% nitric acid, and metal iron, preferably powdered metal iron, tin salts and lead salts as main components. The present invention provides a method for manufacturing a steel product coated with a colored anti-corrosion coating produced by heating the solution to a temperature close to 60 points and applying a colored anti-rust treatment to the surface of the steel product.
次に本発明に使用する処理液の組成割合を第１表に示し
た。Next, Table 1 shows the composition ratio of the treatment liquid used in the present invention.
第 １ 表 （処理液組成）
＠成割合の数字は丁べて型破％）
ｆｌ 燐酸ソーダを添加、７は五穀化燐換算値で゛あ
る
（２）、（３） は夫々過酸化鉛を添加（４）、（５
） は夫々四三酸化鉛を添加金ｗ４吹けすべて鉄粉を使
用した。Table 1 (Treatment liquid composition) (Figures for formation ratio are % of mold breakage) fl Sodium phosphate is added, 7 is the equivalent value of five-grain phosphorus (2) and (3) are lead peroxide added respectively. Addition (4), (5
) were all made of iron powder, each with trilead tetroxide added to gold w4.
第１表より五酸化燐を大量使用すると亜硝酸ソーダ及び
硝酸ソーダを使用する必祿がない。From Table 1, if a large amount of phosphorus pentoxide is used, there is no need to use sodium nitrite and sodium nitrate.
苛性ンニグの代りに苛性力ＩＪ ｋ使用しても同様であ
る。The same effect can be obtained even if caustic force IJk is used instead of caustic coating.
処理温度は使用苛性ソーダの濃度による沸点温度によっ
て決定され、４５％苛性ノーグ溶液の場合はその部点け
１４０°Ｃ程度であるため、処理温度を１４０“Ｃ前後
の場合、処理時間は６分以上を必要とし、１０〜１５分
程反が好適である。The processing temperature is determined by the boiling point temperature depending on the concentration of the caustic soda used, and in the case of a 45% caustic nog solution, the temperature is about 140°C, so if the processing temperature is around 140"C, the processing time should be at least 6 minutes. It is preferable to incubate for about 10 to 15 minutes.
本発明における燐酸ソーダ又は五酸化燐、亜硝酸ソーダ
の存在下における鉄鋼製品の表面Ｑζ四三酸化鉄が生成
する反応は下記の通りである。The reaction in which Qζ triiron tetroxide is produced on the surface of a steel product in the presence of sodium phosphate, phosphorus pentoxide, or sodium nitrite in the present invention is as follows.
例えヒ処理液組成が以下の様な場合、
ＮａＯＨ４５Ｆ＆量％
４ Ｎａ５ＰＯ，−＋ ６ Ｎａ２Ｏ＋ ５ Ｐ、０５
−・・・−・−・・・・・・−１１）３ Ｆｅ ＋２
Ｐ２０５＋６ Ｎａ２Ｏ＋） Ｆｅ３Ｏ４＋４ Ｎ ａ
３ＰＯ３・・・・・（２）ｆｌ）、（２１の反応を纒め
ると次の反応式（３）Ｋなる。For example, if the treatment solution composition is as follows, NaOH45F&Amount% 4 Na5PO,-+ 6 Na2O+ 5 P,05
−・・・−・−・・・・・・−11)3 Fe +2
P205+6 Na2O+) Fe3O4+4 Na
3PO3...(2)fl), (Summing up the reactions in 21, the following reaction formula (3)K is obtained.
４ Ｎａ、ＰＯ，−１−３Ｆｅ−＋Ｆｅ５０．＋４ Ｎ
ａ、ＰＯ３・・・・−・−・・−・（３）この場合Ｎａ
２ＦｅＯ，（鉄酸ソーダ）の存在が必要であるため処理
液に金属鉄、好適に、は鉄粉を添加するか又は鉄の容器
を使用してもよい。4 Na, PO, -1-3Fe-+Fe50. +4 N
a, PO3・・・・−・−・・−・(3) In this case, Na
Since the presence of 2FeO (sodium ferrate) is required, metallic iron, preferably iron powder, may be added to the processing solution, or an iron container may be used.
なお、燐酸ソーダを使用しない従来法においては、例え
ば処理液組成が
ＮａＯＨ４６重童％
の場合には、
４ ＮａＮＯ３−＋ ２Ｎ２０．＋ ２Ｎａ２０ ・
・−・−−−−・・旧・・、、、 （４）Ｆｅ ＋２
Ｎ２０６＋２ Ｎａ２Ｏ−？ Ｆｅ３Ｏ４＋４ ＮａＮ
Ｏ２・−・−” ｉ５１纏めると、
Ｆｅ ＋４ ＮａＮＯ３−＋ Ｆｅ、０４＋ ４ Ｎａ
ＮＯ２＝ ・−−−・・・（６１本発明の場合、鉄鋼製
品に先づ曲脂の付着除実施Ｉｓ１
脱脂、アルカリ処理、酸洗、水洗を省略した鉄鋼製品を
使用し、
苛性ソーダ ４５ Ｎｉｔ％五酸化燐
０．５＃
亜硝酸ソーダ ５ り
硝酸ソーダ ５Ｉ）
錫酸ソーダ １．５慟／１
鉄 粉 １％・・の処理液
によって鉄鋼製品を１４０”Ｃ１１０分間浸漬して著し
く投錨性がよく表１ｆｉに四三酸化鉄の被膜を生じた。In the conventional method that does not use sodium phosphate, for example, when the treatment liquid composition is NaOH46%, 4NaNO3-+ 2N20. +2Na20・
・−・−−−−・・Old・・ （4）Fe +2
N206+2 Na2O-? Fe3O4+4 NaN
O2・−・−”i51To summarize, Fe +4 NaNO3−+ Fe, 04+ 4 Na
NO2 = ・----... (61 In the case of the present invention, the adhesion of condensate is first removed from the steel products Is1. Steel products that omit degreasing, alkali treatment, pickling, and water washing are used, and caustic soda 45 Nit% phosphorus pentoxide
0.5# Sodium nitrite 5 Sodium nitrate 5I) Sodium stannate 1.5ml/1 iron powder 1%... Steel products were immersed for 140"C110 minutes in a treatment solution with excellent anchoring properties as shown in Table 1fi. A film of triiron tetroxide was formed.
しかも添加した錫塩が鉄鋼製品表面の非金属部に膜状に
被覆するから防ｄ効果が一層大で被膜は従来にない緻密
で硬く、美麗で装飾的価値が大である。苛性ソーダの代
りに苛性カリを使用するも全く同様である。Moreover, since the added tin salt coats the non-metallic parts of the surface of the steel product in the form of a film, the anti-d effect is even greater, and the film is denser, harder, more beautiful than ever before, and has great decorative value. The same is true if caustic potash is used instead of caustic soda.
実施例 ２
実施例１と同様に
苛性ソーダ ５ｏ 重量％
五酸化燐 １０ 重量％
錫酸ソーブ ２ ／／
鉄粉 ３＄・／
の処理液を使用し、鉄鋼製品全１４５°Ｃ１加分聞浸漬
して実施例１と同様に鉄ｗ４製品に従来にない硬い四三
酸化鉄の被膜が生成し美麗な黒色に仕上った。Example 2 In the same manner as in Example 1, all steel products were immersed at 145°C for 1 increments using a treatment solution containing 50% by weight of caustic soda, 10% by weight of phosphorus pentoxide, 2% by weight of stannic acid sorb, and 3$// of iron powder. As in Example 1, an unprecedentedly hard triiron tetroxide film was formed on the iron W4 product, resulting in a beautiful black finish.
苛性ソーダの代りに苛性カリを使用するも全く同様であ
る。The same is true if caustic potash is used instead of caustic soda.
本発明は処理液に金属鉄、好適には鉄粉を使用すること
と亜硝酸ソーダ及び硝酸ソーダを使用することなく五酸
化燐又は燐酸ソーダを使用する、また五酸化燐又は燐酸
ソーダに亜硝酸ソーダ又は硝酸ソーダを併用する場合に
は五酸化燐又は燐酸ソーダの添加Ｉｎ少くすることがで
きる利点がある。The present invention uses metallic iron, preferably iron powder, in the treatment liquid, uses phosphorus pentoxide or sodium phosphate without using sodium nitrite or sodium nitrate, and also uses nitrite in addition to phosphorus pentoxide or sodium phosphate. When soda or sodium nitrate is used in combination, there is an advantage that the amount of added phosphorus pentoxide or sodium phosphate can be reduced.
特許出願人 おｍ 鈴木清士 代理人 弁理士水田−聯日制Patent applicant: Kiyoshi Suzuki Agent: Patent Attorney Mizuta-Union Japan System
Claims (1)
％の溶液に五酸化燐又は燐酸ソーダ０．５〜１０重菫％
、（五酸化燐換算値゛）及び／又は亜硝酸ソーダ、５〜
１５重量％及び硝酸ソーダ、３〜８重量％更に金属鉄、
鉛の塩類と錫の塩類とを主成分として添加した処理液に
浸漬して使用苛性アルカリ溶液の濃度における沸点近く
までの温度に加熱して鉄鋼製品表面に有色防錆処理を施
してなる着色防錆被膜金被覆した鉄鋼製品の製造法。Add degreased and washed steel products to a solution of 40% to 1% caustic alkali and 0.5% to 10% phosphorus pentoxide or sodium phosphate.
, (phosphorus pentoxide equivalent) and/or sodium nitrite, 5~
15% by weight and sodium nitrate, 3-8% by weight further metallic iron,
A colored anti-rust treatment is applied to the surface of a steel product by immersing it in a treatment solution containing lead salts and tin salts as main components and heating it to a temperature close to the boiling point of the caustic alkaline solution used. A method for manufacturing rust-coated gold-coated steel products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19159481A JPS5893876A (en) | 1981-11-28 | 1981-11-28 | Production of iron and steel products coated with colored rust preventive film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19159481A JPS5893876A (en) | 1981-11-28 | 1981-11-28 | Production of iron and steel products coated with colored rust preventive film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5893876A true JPS5893876A (en) | 1983-06-03 |
Family
ID=16277230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19159481A Pending JPS5893876A (en) | 1981-11-28 | 1981-11-28 | Production of iron and steel products coated with colored rust preventive film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5893876A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63106570A (en) * | 1986-10-23 | 1988-05-11 | Takaoka Ind Ltd | Charge display device |
| EP1284309A1 (en) * | 2001-07-20 | 2003-02-19 | Zwez Chemie Gmbh | Components and process for the preparation and regeneration of a burnishing bath |
| CN100359038C (en) * | 2003-09-03 | 2008-01-02 | 兰州理工大学 | Inner wall spray melting device and method of mud pump cylinder liner |
-
1981
- 1981-11-28 JP JP19159481A patent/JPS5893876A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63106570A (en) * | 1986-10-23 | 1988-05-11 | Takaoka Ind Ltd | Charge display device |
| EP1284309A1 (en) * | 2001-07-20 | 2003-02-19 | Zwez Chemie Gmbh | Components and process for the preparation and regeneration of a burnishing bath |
| CN100359038C (en) * | 2003-09-03 | 2008-01-02 | 兰州理工大学 | Inner wall spray melting device and method of mud pump cylinder liner |
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