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KR950006407Y1 - Test electro-plating cell - Google Patents

Test electro-plating cell Download PDF

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Publication number
KR950006407Y1
KR950006407Y1 KR2019930017147U KR930017147U KR950006407Y1 KR 950006407 Y1 KR950006407 Y1 KR 950006407Y1 KR 2019930017147 U KR2019930017147 U KR 2019930017147U KR 930017147 U KR930017147 U KR 930017147U KR 950006407 Y1 KR950006407 Y1 KR 950006407Y1
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South Korea
Prior art keywords
plating solution
electrode
nozzle
test piece
negative electrode
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KR2019930017147U
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Korean (ko)
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KR950006398U (en
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김영봉
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포항종합제철 주식회사
조말수
재단법인산업과학기술연구소
백덕현
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Priority to KR2019930017147U priority Critical patent/KR950006407Y1/en
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    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D21/00Processes for servicing or operating cells for electrolytic coating
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/02Tanks; Installations therefor
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/06Suspending or supporting devices for articles to be coated
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/10Electrodes, e.g. composition, counter electrode
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/08Electroplating with moving electrolyte e.g. jet electroplating
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/20Metals
    • G01N33/208Coatings, e.g. platings

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)

Abstract

내용 없음.No content.

Description

실험용 전기 도금조Laboratory Electroplating Bath

제 1 도는 본 고안에 따른 실험용 전기 도금조의 단면도.1 is a cross-sectional view of the experimental electroplating bath according to the present invention.

제 2 도는 전극홀더와 노즐의 분해 단면도.2 is an exploded cross-sectional view of the electrode holder and the nozzle.

제 3 도는 종래 기술에 따른 실험용 전기도금조의 구성도이다.3 is a configuration diagram of an experimental electroplating bath according to the prior art.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

10 : 저장용기 15a, 15b : 격판10: storage container 15a, 15b: diaphragm

17a, 17b : 지지대 20 : 눈금(scale)17a, 17b: support 20: scale

26a, 26b : 이동대 32a, 32b : 보울트부재26a, 26b: movable base 32a, 32b: bolt member

45a : 양극 45b : 음극45a: anode 45b: cathode

47 : 모터펌프 50 : 노즐(Nozzle)47: motor pump 50: nozzle (Nozzle)

54a : 분사구멍 60 : 도금용액54a: injection hole 60: plating solution

65 : 시험편65: test piece

본 고안은 실험용 저기도금조에 관한 것으로서, 보다 상세히는 음극과 양극의 간격을 자유로이 조절할 수 있으며, 극간거리가 변화하더라도 시험편의 일정한 위치에서 도금용액이 분사될 수 있는 실험용 전기도금조에 관한 것이다.The present invention relates to an experimental low plating tank, and more particularly, to an experimental electroplating tank that can freely adjust the distance between the cathode and the anode, and that the plating solution can be sprayed at a certain position of the test piece even when the interpolar distance is changed.

일반적으로, 실험용 전기도금조(100)는 제 3 도에 도시된 바와 같이, 히터(heater)(미도시)가 내장된 받침대(105)의 상부에 도금용액이 저장되는 용기(110)가 갖춰지고, 상기 용기(10)내부에는 양측면에 각각 음극(112)과 양극(114)이 장착되어 일정간격으로 유지되어 있다. 또한 상기 저장용기(110)의 일측으로는 공기(Air), 아르곤(Ar), 또는 질소(N2)가 모터펌프(117)에 의해서 도금용액의 내부로 공급되는 공기통로(120)를 형성하고 있다. 상기와 같이 구성된 종래의 실험용 전기도금조(100)는 음극(112)과 양극(114)을 고정시켜 놓고, 상기 음극(112)과 양극(114)사이의 간격응 경사시켜 음극(112)에 정착된 시험편(125)의 넓이에 따라서 극간거리를 다르게 하는 것이었다. 그러나 이와같이 구조은 극간거리의 조정이 매우 어렵게 이루어지고, 또한 다양한 조절이 어렵기 때문에 하나의 시험편 내에서 균일한 전류밀도의 도금이 불가능하고, 극간거리에 따른 도금특성을 평가하기가 매우 어려운 것이었다.In general, the experimental electroplating bath 100 is provided with a container 110 in which a plating solution is stored on top of a pedestal 105 having a heater (not shown) as shown in FIG. The cathode 10 and the anode 114 are mounted on both sides of the container 10 and maintained at predetermined intervals. In addition, one side of the storage container 110 forms an air passage 120 through which air, argon, or nitrogen (N 2 ) is supplied into the plating solution by the motor pump 117. have. The conventional experimental electroplating bath 100 configured as described above fixes the cathode 112 and the anode 114, and inclines the gap between the cathode 112 and the anode 114 to settle the cathode 112. The inter-pole distances were varied according to the widths of the test pieces 125. However, this structure is very difficult to adjust the inter-pole distance, and also difficult to control a variety of uniform current density plating in one test piece, it was very difficult to evaluate the plating characteristics according to the inter-pole distance.

본 고안은 상기와 같은 종래의 문제점을 해소하기 위한 것으로, 전극간의 거리조절이 용이하도록 전극이동대를 설치하고, 시험편 상부에 탈착이 가능한 도금용액 분사조즐을 설치하여 극간거리의 변화와 동시에 균일한 도금 용액분사가 이루어질수 있는 실험용 전기도금조를 제공함에 그 목적이 있다.The present invention is to solve the conventional problems as described above, and to install the electrode moving table to facilitate the distance between the electrodes, and to install a detachable plating solution injection nozzle on the upper part of the test piece uniformity and change at the same time between the poles The purpose is to provide an experimental electroplating bath in which one plating solution spray can be made.

이하, 본 고안의 실험용 전기도금조(1)가 도시되어 있다.Hereinafter, an experimental electroplating tank 1 of the present invention is shown.

제 1 도는 본 고안의 실험용 전기도금조(1)가 도시되어 있다.1 shows an experimental electroplating tank 1 of the present invention.

상기 전기 도금조(1)는 저장용기(10)의 내측하부에 히터(heater)(미도시)을 내장한 받침대(12)가 갖춰지고, 그 일측에는 도금작업을 제어하는 조작부(14)가 마련된다. 또한, 상기 저장용기(10)의 상부 모서리에는 서로 대향한 격판(15a)(15b)이 일체로 마련되어 있고, 상기 격판(15a)(15b)의 대향측면에는 각각 한쌍의 지지대 (17a)(17b)가 상부면에 눈금(scale)(20)을 형성하고, 일정간격을 유지하면서 상기 격판(15a)(15b)을 연결하도록 고정설치된다. 또한, 상기 지지대(17a)(17b)에는 연결봉(22a)(22b)에 의해서 전극홀더(24a)(24b)를 각각 장착한 이동대(26a)(26b)가 탈착 가능토록 결합되는 바, 상기 이동대(26a)(26b)는 각각 하부면에형요홈(28a)(28b)을 형성하고, 상기 요홈(28a)(28b)는 지지대(17a)(17b)의 양외측면 사이의 거리에 해당하는 크기를 갖는다. 또한, 상기 이동대(26a)(26b)의 전방 일측면에는 각각 암나사 구멍(미도시)이 상기 요홈(28a)(28b)까지 연장하도록 관통 형성되고, 상기 암나사구멍에는 보울트 부재(32a)(32b)가 나사결합하고 있다. 여기서 상기 보울트 부재(32a)(32b)의 길이는 암나사 구멍의 나사부 길이보다 긴 것이 사용되는 것이다. 또한, 상기 이동대(26a)(26b)에는 중앙에 상, 하 방향으로 관통 구멍(미도시)이 각각 형성되고, 상기 관통구멍에는 도전성재료로 이루어지는 연결봉(22a)(22b)의 상단부에 각각 형성된 숫나사부(34a)(34b)가 하부로 부터 끼워져서 이동대(26a)(26b)의 상부로 돌출되고, 고정너트(36a)(36b)가 각각 결합된다. 따라서 상기 연결봉(22a)(22b)은 지지대 (17a)(17b)사이에서 각각 위치되고, 하부로 연장되어 하단부에 전극홀더(24a)(24b)를 장착하게되며, 이때 상기 연결봉(22a)(22b)은 하단부에 숫나사부(38a)(38b)를 형성하고, 이 숫나사부(38a)(38b)가 전극 홀더(24a)(24b)의 상부에 형성된 암나사구멍(42a)(42b)에 각각나사결합함으로 서로 연결되는 것이다. 또한, 상기 전극홀더(24a)(24b)는 내산, 비전도성 재질로 이루어지고, 각각형 단면을 형성하며, 서로 마주하도록 위치되어 일측면에 각각 음극(45a)과 양극(45b)을 장착하게 된다.The electroplating tank 1 is provided with a pedestal 12 having a heater (not shown) embedded in the inner lower portion of the storage container 10, and one side of the electroplating tank 1 is provided with an operation unit 14 for controlling the plating operation. do. In addition, diaphragm 15a, 15b opposing each other is integrally provided at the upper edge of the storage container 10, and a pair of supports 17a, 17b, respectively, on opposing side surfaces of the diaphragm 15a, 15b. Is formed on the upper surface (scale) 20, and is fixed to connect the diaphragm (15a, 15b) while maintaining a constant interval. In addition, the support bars (17a) and (17b) are coupled to each other by the connecting rods (22a) and (22b) so that the movable tables (26a) and (26b) mounted with the electrode holders (24a) and (24b), respectively, are detachable. Stand 26a and 26b are respectively The grooves 28a and 28b are formed, and the grooves 28a and 28b have a size corresponding to the distance between both outer sides of the supports 17a and 17b. In addition, a female screw hole (not shown) penetrates through each of the front side surfaces of the movable tables 26a and 26b to the grooves 28a and 28b, respectively, and the bolt members 32a and 32b are formed in the female screw hole. ) Is screwing in. Here, the length of the bolt members 32a and 32b is longer than the length of the threaded portion of the female screw hole. In addition, through holes (not shown) are respectively formed at the centers of the movable tables 26a and 26b in the up and down directions, and the through holes are respectively formed at upper ends of the connecting rods 22a and 22b made of a conductive material. The male screw portions 34a and 34b are fitted from the bottom to protrude to the upper portions of the movable tables 26a and 26b, and the fixing nuts 36a and 36b are respectively engaged. Accordingly, the connecting rods 22a and 22b are positioned between the supports 17a and 17b, respectively, and extend downward to mount the electrode holders 24a and 24b at the lower ends thereof. ) Is provided at the lower end with male threads 38a and 38b, and the male threads 38a and 38b are respectively screwed into female threaded holes 42a and 42b formed in the upper portions of the electrode holders 24a and 24b. To connect with each other. In addition, the electrode holder (24a, 24b) is made of acid-resistant, non-conductive material, respectively It forms a cross section, and is positioned to face each other to mount the cathode 45a and the anode 45b on one side, respectively.

따라서, 상기 음극(45a)과 양극(45b)는 각각 연결봉(22a)(22b)의 하단부에 접촉되어 전기적으로 연결되는 것이다.Accordingly, the cathode 45a and the anode 45b are electrically connected to the lower ends of the connecting rods 22a and 22b, respectively.

한편, 상기 저장용기(10)의 일측 상부에는 내산용 모터펌프(47)가 마련되고, 사이 모터펌프(47)에는 내산성 비닐호스로 이루어지는 도금용액 유입관(48a)이 저장용기(10)의 내측 하부로부터 연결되며, 또한 도금 용액 토출관(48b)이 음극의 전극홀더(24b)에 장착되는 노즐(50)까지 연결된다. 그리고, 상기 노즐(50)는 제 2 도에 보다 상세히 도시된 바와같이 내산성 재질로 이루어지고, 일측에는 전극홀더(24b)의 상부면에 탄력적으로 탈착 가능하도록 끼워지는형 절곡부(52a)를 형상하며, 그 반대측에는 전극홀더(24b)의 가로 방향을 따라서 길게 연장하는 분사구멍(54a)을 갖는 노즐 분사부(54)를 형성한다.Meanwhile, an acid-resistant motor pump 47 is provided at an upper portion of the storage container 10, and the plating solution inflow pipe 48a formed of an acid-resistant vinyl hose is provided at the inner side of the storage container 10. It is connected from the bottom, and also the plating solution discharge pipe 48b is connected to the nozzle 50 mounted to the electrode holder 24b of the cathode. And, the nozzle 50 is made of an acid resistant material, as shown in more detail in Figure 2, one side is fitted to be detachably detachable to the upper surface of the electrode holder (24b) The nozzle bent part 54a is formed in the shape of the shape bent part 52a, and the injection part 54a which has the injection hole 54a extended along the horizontal direction of the electrode holder 24b on the opposite side.

또한, 상기 노즐 분사부(54)로는 상기 모터 펌프(47)로부터 연장되는 도금용액 토출관(48b)의 하단부가 끼워지는 구멍(55)이 형성되어 도금용액 토출관(48b)과 연결되는 것이다. 따라서 모터 펌프(47)가 가동되는 경우, 도금 용액 유입관(48a)으로 도금용액(60)이 흡인되어 도금용액 토출관(48b)을 통해 노즐(50)의 노즐 분사부(54)로 공급되고, 노즐 분사부(54)에 마련된 분사구멍(54a)을 통해서 시험편(65)에 전체 길이에 걸쳐서 균일하게 토출되어 분사되는 것이다.In addition, the nozzle injection part 54 is formed with a hole 55 into which the lower end of the plating solution discharge tube 48b extending from the motor pump 47 is fitted, and is connected to the plating solution discharge tube 48b. Therefore, when the motor pump 47 is operated, the plating solution 60 is sucked into the plating solution inlet pipe 48a and supplied to the nozzle sprayer 54 of the nozzle 50 through the plating solution discharge pipe 48b. Through the injection hole 54a provided in the nozzle injection part 54, the test piece 65 is discharged and sprayed uniformly over the whole length.

미설명부호(70a)(70b)는 연결봉(22a)(22b)의 상단부에 각각 전원을 공급하는 전극 집게이다.Reference numerals 70a and 70b are electrode clamps for supplying power to the upper ends of the connecting rods 22a and 22b, respectively.

상기와 같이 구성된 본 고안은, 전기 도금을 하고자 하는 경우 작업자가 시험편(65)을 음극(45b)에 장착시킨 다음, 양극(45a)이 장착된 이동대(26a)의 보울트부재(32a)를 전진시켜서 조여주게 되면 보울트부재(32a)의 선단부가 지지대(17a)의 일측면을 밀게 되어 이동대(26a)가 지지대(17a)(17b)상에 견고히 고정되고, 시험편(65)이 장착된 음극(45b)에 연결되는 이동대(26b)는 보울트 부재(32b)를 후진시켜서 이동대(26b)가 지지대(17a)(17b)상에서 움직일 수 있도록 한 상태에서 지지대(17a)의 상부면에 마련된 눈금(20)을 이용하여 원하는 거리만큼 위치이동시키고, 다시 보울트 부재(32b)를 전진시켜 상기 이동대(26b)를 고정시키면 양극(45a)과 음극(45b)의 거리조정이 완료되는 것이다. 이때, 상기 음극(45b)이 장착된 전극 홀더(26b)에는 노즐(50)이 시험편(65)의 직상부에 장착된 상태이고, 상기 노즐(50)에 연결된 도금용액 토출관(48b)은 내산성 비닐 호스로 이루어지기 때문에 가요성(Flexibility)을 갖추어서 전극홀더(24b)의 위치이동에 따라 자연스럽게 이동될 수 있는 것이다. 또한, 상기 모터 펌프(47)는 상기 연결봉(22a)(22b)의 상단부에 전극집게(70a)(70b)가 연결되어 +,-전원이 공급되는 경우, 가동되어 도금용액(60)을 시험편(65)에 전체적으로 고르게 분사시켜 주게 된다. 이때, 상기 노즐(50)은 도금용액 내부에 침전된 상태에서 도금용액을 시험편(65)에 분사시키도록 구성됨은 물론이다. 한편, 상기와 같은 과정을 통해서 시험편(65)의 도금작업이 완료되면, 작업자는 전극집게(70a)(70b)를 해체 분리하고, 노즐(50)을 전극홀더(24b)로부터 상부로 인출하여 분리시키며, 연결봉(22b)의 상단부에 결합된 고정나사(36b)를 해체하여 음극(45b)장착용 전극 홀더(24b)를 90°회전시킨 다음, 상부로 들어올려 지지대(17a)(17b)사이를 통해 외부로 인출시키고, 시험편(65)을 취외(取外)시키면 되는 것이다.According to the present invention configured as described above, when the electroplating is to be performed, the operator mounts the test piece 65 on the negative electrode 45b, and then advances the bolt member 32a of the movable table 26a on which the positive electrode 45a is mounted. When tightened by tightening, the tip of the bolt member 32a pushes one side of the support 17a so that the movable table 26a is firmly fixed on the supports 17a and 17b, and the negative electrode having the test piece 65 mounted thereon. The movable base 26b connected to 45b is a scale provided on the upper surface of the support 17a in a state in which the bolt member 32b is moved backward so that the movable base 26b can move on the supports 17a and 17b. 20) by moving to a desired distance and moving the bolt member 32b again to fix the movable table 26b, the distance adjustment of the anode 45a and the cathode 45b is completed. In this case, the nozzle 50 is mounted on the electrode holder 26b on which the cathode 45b is mounted, and the plating solution discharge tube 48b connected to the nozzle 50 is acid resistant. Since it is made of a vinyl hose having flexibility (flexibility) can be moved naturally according to the position movement of the electrode holder (24b). In addition, the motor pump 47 is operated when the electrode clamps 70a and 70b are connected to the upper ends of the connecting rods 22a and 22b, and the + and − power are supplied. It is sprayed evenly on the whole. At this time, the nozzle 50 is configured to spray the plating solution on the test piece 65 in a state precipitated inside the plating solution. On the other hand, when the plating operation of the test piece 65 is completed through the above process, the operator dismantles and separates the electrode tongs (70a, 70b), the nozzle 50 is pulled out from the electrode holder 24b to separate Then, the fixing screw 36b coupled to the upper end of the connecting rod 22b is dismantled to rotate the electrode holder 24b for mounting the negative electrode 45b, and then lifts the upper portion to raise the upper portion between the supports 17a and 17b. The test piece 65 may be taken out through the outside through the outside.

상기에서와 같이 본 고안에 의하면, 양극(45a)과 음극(45b)을 각각 장착한 전극홀더(24a)(24b)가 연결봉(22a)(22b)에 의해서 이동대(26a)(26b)에 연결되고, 상기 이동대(26a)(26b)는 한쌍의 지지대(17a)(17b)상에서 눈금(20)을 이용하여 각각 위치 이동가능하기 때문에 전극 사이의 간격 조절이 정확하고 균일하게 이루어진다. 또한 도금용액이 노즐(50)을 통해서 항상 시험편(65)의 일정한 위치에서 분사되기 때문에 균일한 분사조건에서 도금작업이 이루어지게 되어 균일한 도금층이 시험편(65)에 형성되는 실용상의 효과를 얻는 것이다.According to the present invention as described above, the electrode holder (24a, 24b) equipped with the positive electrode (45a) and the negative electrode (45b), respectively, is connected to the movable table (26a, 26b) by connecting rods (22a, 22b) Since the movable tables 26a and 26b are each movable on the pair of supports 17a and 17b using the scales 20, the gaps between the electrodes are precisely and uniformly adjusted. In addition, since the plating solution is always sprayed at a constant position of the test piece 65 through the nozzle 50, the plating is performed under uniform spraying conditions, thereby obtaining a practical effect that a uniform plating layer is formed on the test piece 65. .

Claims (1)

도금용액(60)이 담긴 저장용기(10) 내에 양극(45a)과 음극(45b)을 갖추고, 상기 양극(45a)과 음극(45b)에 전원을 공급하여 시험편(65)에 전기도금을 실행하는 전기도금조에 있어서, 상기 저장용기(10)의 상부에는 격판(15a)(15b)이 대향하여 고정되고, 상기 격판(15a)(15b)에는 상부면에 눈금(20)을 형성한 한쌍의 지지대(17a)(17b)가 일정간격으로 고정되며, 상기 지지대(17a)(17b)에는 한쌍의 이동대(26a)(26b)가 위치 이동 가능하도록 장착되는 한편, 상기 이동대(26a)(26b)에는 도전성 재료의 연결봉(22a)(22b)에 의해서 전극홀더(24a)(24b)의 양극(45a)과 음극(45b)이 연결되며, 상기 음극(45b)이 장착된 전극홀더(24b)에는 모터펌프(47)에 의해서 도금용액이 공급되는 노즐(50)이 장착되어 시험편(65)에 도금용액을 균일하게 분사시킴을 특징으로 하는 실험용 전기 도금조.A positive electrode 45a and a negative electrode 45b are provided in the storage container 10 containing the plating solution 60, and the electroplating is performed on the test piece 65 by supplying power to the positive electrode 45a and the negative electrode 45b. In the electroplating tank, a pair of supports having a diaphragm (15a, 15b) is fixed to the upper portion of the storage container 10, the graduation (20) on the upper surface on the diaphragm (15a, 15b) ( 17a) and 17b are fixed at regular intervals, and a pair of movable tables 26a and 26b are mounted on the supports 17a and 17b so as to be movable in position, while the movable tables 26a and 26b are mounted on the movable tables 26a and 26b. A positive electrode 45a and a negative electrode 45b of the electrode holders 24a and 24b are connected by connecting rods 22a and 22b of a conductive material, and a motor pump is connected to the electrode holder 24b on which the negative electrode 45b is mounted. An electroplating bath for experiment, characterized in that the nozzle (50) to which the plating solution is supplied by (47) is mounted to uniformly spray the plating solution on the test piece (65).
KR2019930017147U 1993-08-31 1993-08-31 Test electro-plating cell Expired - Fee Related KR950006407Y1 (en)

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KR2019930017147U KR950006407Y1 (en) 1993-08-31 1993-08-31 Test electro-plating cell

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KR2019930017147U KR950006407Y1 (en) 1993-08-31 1993-08-31 Test electro-plating cell

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KR950006398U KR950006398U (en) 1995-03-20
KR950006407Y1 true KR950006407Y1 (en) 1995-08-10

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