JPS58221287A - Chromate treatment of plated mechanical parts - Google Patents

Chromate treatment of plated mechanical parts

Info

Publication number
JPS58221287A
JPS58221287A JP10480582A JP10480582A JPS58221287A JP S58221287 A JPS58221287 A JP S58221287A JP 10480582 A JP10480582 A JP 10480582A JP 10480582 A JP10480582 A JP 10480582A JP S58221287 A JPS58221287 A JP S58221287A
Authority
JP
Japan
Prior art keywords
plated
vessel
chromate
mechanical parts
chromate treatment
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
Application number
JP10480582A
Other languages
Japanese (ja)
Inventor
Kenichi Niizawa
新沢　健一
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokico Ltd
Original Assignee
Tokico Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tokico Ltd filed Critical Tokico Ltd
Priority to JP10480582A priority Critical patent/JPS58221287A/en
Publication of JPS58221287A publication Critical patent/JPS58221287A/en
Pending legal-status Critical Current

Links

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
    • C23C22/73—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 characterised by the process

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)
  • Electroplating Methods And Accessories (AREA)
  • Chemical Treatment Of Metals (AREA)

Abstract

PURPOSE:To improve the corrosion resistance of plated mechanical parts in chromate treatment of the plated mechanical parts by subjecting said parts to ultrasonic oscillation. CONSTITUTION:An ultrasonic vessel is constituted of an outside cell 1 made of stainless steel, an oscillator 2 provided in the bottom of the vessel 1, and an inside vessel of stainless steel or glass inserted into the vessel 1. Water is filled in the vessel 1 and chromate soln. in the vessel 3. Low concn. chromate of about 1-3% concn. of chromic acid (CrO3) and about 5% sulfuric acid is used for the chromate soln. Plated mechanical parts are dipped for about 30sec in the chromate soln. in the vessel 3 and ultrasonic wave of about 5-50kHz frequency is applied thereto with the oscillator 2. The chromate soln. is impregnated into the hole parts of the plated mechanical parts as well and the corrosion resistance thereof is improved by the above-mentioned method.

Description

【発明の詳細な説明】 本発明は、機械的メッキ品の耐食性を向上させるための
クロメート処理方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a chromate treatment method for improving the corrosion resistance of mechanically plated products.

機械的メッキは、メッキされる金属晶、メッキ金属粒、
及びガラス等の小粒の衝撃媒体をバレル中に入れ、バレ
ルを回転させることによシ、金属品にメッキ皮膜を形成
するものであり、電気メッキに比し低コストであること
、亜鉛メッキの場合水素脆性の虞れがないことから、バ
ネ材等の小物部品への応用が広く行なわれている。Mechanical plating consists of metal crystals to be plated, plated metal grains,
A plating film is formed on metal products by placing a small impact medium such as glass in a barrel and rotating the barrel.It is lower cost than electroplating, and in the case of galvanizing. Since there is no risk of hydrogen embrittlement, it is widely applied to small parts such as spring materials.

しかしながら、機械的メッキにおいては衝撃によってメ
ッキ皮膜を形成させるため、皮膜の平滑さに欠け、ポー
ラスなものとなる。従って、耐食性を向上させるため、
クロメート処理を行なっても、微細な空孔部にクロメー
ト液が浸入しないので、塩水噴霧２４時間程度でも自鈷
が発生してしまうという問題があった。However, in mechanical plating, the plating film is formed by impact, so the film lacks smoothness and becomes porous. Therefore, to improve corrosion resistance,
Even when chromate treatment is performed, the chromate solution does not penetrate into the fine pores, so there is a problem in that self-containment occurs even after 24 hours of salt water spraying.

本発明はかかる問題を解消することを目的とするもので
、機械的メッキ品をクロメート処理するに際し、超音波
振動を与えつつ行なうことをＩｒｉ徴とする。The present invention aims to solve this problem, and the chromate treatment of mechanically plated products is performed while applying ultrasonic vibrations.

まず、本発明において使用されるメッキ金属は、亜鉛、
カドミウム及びこれらの合金である。First, the plating metal used in the present invention is zinc,
Cadmium and their alloys.

機械的メッキはメッキ金属、被メッキ品及びガラス粒等
の衝撃媒体をバレル中に入れ、バレルを回転させること
により行なう。Mechanical plating is performed by placing the plating metal, the article to be plated, and an impact medium such as glass particles into a barrel and rotating the barrel.

ついで、このようにして得られた機械的メッキ品を水洗
し、クロメート処理を図面に示す超音波槽を用いて行々
う。The mechanically plated product thus obtained is then washed with water and subjected to chromate treatment using the ultrasonic bath shown in the drawing.

超音波槽は、ステンレス製の外槽１と、該外槽１の底部
に設けられた振動子２と、外槽１内に挿入されたステン
レス製又はガラス製の内槽３とから構成され、外槽１内
には水が、内槽３内にはクロメート液が満されている。The ultrasonic tank is composed of an outer tank 1 made of stainless steel, a vibrator 2 provided at the bottom of the outer tank 1, and an inner tank 3 made of stainless steel or glass inserted into the outer tank 1. The outer tank 1 is filled with water, and the inner tank 3 is filled with a chromate solution.

クロメート処理に用いられるクロメ−ｌ−液としては、
クロム酸濃度（ＣｒＯａ　）　１〜３％、硫酸５％程度
の低濃度のクロメート液が用いられる。The chromate l-liquid used for chromate treatment is
A chromate solution with a low concentration of chromic acid (CrOa) of 1 to 3% and sulfuric acid of about 5% is used.

メッキ品を内槽３内のクロメート液に浸漬する時間は通
常のクロメート処理と同様に３０秒程度で十分である。The time for immersing the plated product in the chromate solution in the inner tank 3 is about 30 seconds, which is the same as in normal chromate treatment.

このクロメート処理に際しては、振動子２により超音波
を与えながら行なうわけであるが、超音波の周波数は５
１Ｇ（ｚ〜５９　ＫＨ２を用いることができる。This chromate treatment is performed while applying ultrasonic waves using the transducer 2, and the frequency of the ultrasonic waves is 5.
1G (z~59 KH2 can be used.

このようにしてクロメート処理が終ったメッキ品は、乾
燥させて全工程が終わる。After the chromate treatment is completed, the plated product is dried to complete the entire process.

以上詳細に述べたように本発明によれは、クロメート処
理時に超音波振動を作用させることによシ、機械的メッ
キ品の空孔部にもクロメート液が沈入し、耐食性を向上
させることができる。As described in detail above, according to the present invention, by applying ultrasonic vibration during chromate treatment, the chromate solution is deposited into the pores of the mechanically plated product, thereby improving corrosion resistance. can.

【図面の簡単な説明】 図面は超音波槽の一例を示す断面図である。 １・・・外　楢　　　２・・・振動子 ３・・・内　槽 代理人　岡　１）喜久夫[Brief explanation of drawings] The drawing is a sectional view showing an example of an ultrasonic bath. 1... Outer oak 2... Vibrator 3...Inner tank Agent Oka 1) Kikuo

Claims (1)

【特許請求の範囲】[Claims] 機械的メッキを施こしたメッキ品を超音波槽内のクロメ
ート液中に浸漬し、超音波振動を与えつつ、クロメート
処理することを特徴とする機械的メッキ品のクロメート
処理方法。A method for chromating a mechanically plated product, characterized by immersing the mechanically plated product in a chromate solution in an ultrasonic bath and performing the chromate treatment while applying ultrasonic vibration.
JP10480582A 1982-06-18 1982-06-18 Chromate treatment of plated mechanical parts Pending JPS58221287A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10480582A JPS58221287A (en) 1982-06-18 1982-06-18 Chromate treatment of plated mechanical parts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10480582A JPS58221287A (en) 1982-06-18 1982-06-18 Chromate treatment of plated mechanical parts

Publications (1)

Publication Number Publication Date
JPS58221287A true JPS58221287A (en) 1983-12-22

Family

ID=14390635

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10480582A Pending JPS58221287A (en) 1982-06-18 1982-06-18 Chromate treatment of plated mechanical parts

Country Status (1)

Country Link
JP (1) JPS58221287A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04350173A (en) * 1991-02-09 1992-12-04 Sumitomo Metal Ind Ltd Chromating processed steel sheet and its manufacture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04350173A (en) * 1991-02-09 1992-12-04 Sumitomo Metal Ind Ltd Chromating processed steel sheet and its manufacture

Similar Documents

Publication Publication Date Title
US4588480A (en) Method of producing wear-protection layers on surfaces of structural parts of titanium or titanium-base alloys
US4163083A (en) Process for improving corrosion resistant characteristics of chrome plated aluminum and aluminum alloys
US3833481A (en) Electroforming nickel copper alloys
US2835630A (en) Treatment of metals prior to electro-plating
JPS58221287A (en) Chromate treatment of plated mechanical parts
US2431947A (en) Formation of a strong bond between a ferrous metal surface and an electrodeposit of silver
US3345276A (en) Surface treatment for magnesiumlithium alloys
US4196061A (en) Direct nickel-plating of aluminum
US3667991A (en) Processes for nickel plating metals
JPS6431996A (en) Method for preventing coagulation of fine grain in electroplating bath
US4171247A (en) Method for preparing active cathodes for electrochemical processes
US2227454A (en) Method of gold plating steel and ferrous alloys
JPS5735697A (en) Production of chromate film steel plate for vessel of superior weldability and corrosion resistance after painting
Drake Electrodeposition in ultrasonic fields
US3915812A (en) Method of manufacturing tinned plates having high corrosion resistant property
US3880727A (en) Method of pretreating bands and sheets of steel for one-layer enameling, and electrolytic bath for use in connection therewith
JPH0154438B2 (en)
JPH10265974A (en) Liquid etchant for pretreating titanium or titanium alloy to be plated and pretreatment of titanium or titanium alloy to be plated
JPH0211775A (en) Treatment to prevent sticking of plating metal to stainless steel which comes in contact with electroless plating liquid
US2784486A (en) Electrodeposition of uranium oxide
US3821093A (en) Method of fabrication of a probe for a hygrometer
US2872389A (en) Treatment of uranium surfaces
JPS5735698A (en) Production of chromate film steel plate for vessel of superior weldability and corrosion resistance after painting
Ginberg et al. The effect of an ultrasonic field on elastic properties of steel during zinc plating
Ballay Modern Nickel‐Plating in France