• Title, Summary, Keyword: coating method

Search Result 2,552, Processing Time 0.041 seconds

A Study on the Improvement of Multi-Layer Coating Method on Concrete Base (성형 콘크리트 복층마감도장 공법 개선에 관한 연구)

  • Kim, Chong-Weon;Choi, In-Sung
    • Journal of the Korea Institute of Building Construction
    • /
    • v.3 no.1
    • /
    • pp.93-105
    • /
    • 2003
  • The Precast Concrete(PC) method was developed for a large production of a structure in Europe. Afterwards, this PC method has been applied to a structure and an outside Coating of buildings extensively. The outside Coating of the building applied this PC method is a method to put tiles or stones to base concrete. And there is a method to use paints for, so the expression of various patterns is possible. The Multi-Layer Coating is one of the methods to use paints. This Multi-Layer Coating method can show various designs of external appearance with Foam when it is made with the PC panel. Also, the paint film of the PC panel enables a splendid appearance, and a protective function of concrete is possible, too. Therefore, it makes good durability of the PC. Besides, maintenance is easy to manage because it is free from pollution when it uses metallic materials, stones, or any other materials. You might have no trouble in applying the Multi-Layer Coating method in order to save a merit of an outside Coating on the PC panel. However, the Multi-Layer Coating method used as a current outside Coating method has pollution and bad working environment because Oil Epoxy Resins have toxicity and flammability. Therefore, a lot of warnings are required for coating work in order to have appropriate quality because working hours are short, and production efficiency is low too. These reasons make the cost of construction of the Multi-Layer Coating method increase. And employers or designers may have problems in selecting this Multi-Layer Coating method. Therefore, the purpose of this study is to get activation of the Multi-Layer Coating method by offering improvement measures about the problems of the existing Multi-Layer Coating method.

Characterization of a Functional Coating Film Synthesized on the Ceramic Substrate for Electrical Insulator Application according to Coating Method

  • Shan, Bowen;Kang, Hyunil;Choi, Wonseok;Kim, Jung Hyun
    • Transactions on Electrical and Electronic Materials
    • /
    • v.18 no.3
    • /
    • pp.148-150
    • /
    • 2017
  • For the improvement of the anti-fouling features of porcelain electrical insulators, in this study, the surface of an insulator was coated with a functional material to expand the insulator's self-cleanness. The anti-fouling and mechanical features of the functional film coating of ceramic substrates made from components like an electrical insulator were analyzed. The coating methods that were used were spray coating, dip coating, and fabric coating. Following the coating, the contact angle of the coated surface was measured, revealing that the spray coating method offered the lowest angle ($13.7^{\circ}$) and a strong hydrophilic feature. The anti-fouling analysis showed that the anti-fouling features improved as the contact angle decreased. The mechanical properties - hardness and adhesion - were both excellent at 9H and 5B, respectively, regardless of the coating method that was used.

An Experimental Study on the Properties of Strength for Lightweight Concrete of Coated Scoria Lightweight Aggregate (피복 화산암재를 이용한 경량콘크리트의 강도특성에 관한 실험적연구)

  • 이시우;서치호
    • Magazine of the Korea Concrete Institute
    • /
    • v.2 no.4
    • /
    • pp.61-68
    • /
    • 1990
  • This experimental study is aimed to investigate the coating method of scoria lightweight aggregate for reo duction of water absorption and the physical dynamic characteristics of coated-scoria jightweight aggregate con¬crete. The coating methods are as follows: I) Non-coating method. II) Coating method of only cement paste. rn) Coating mehtod of surface-coating agent after coating by cement paste. IV) Coating method of only surfaee-coating agent. V) Coating method of cement pasted after coating by surface-coating agent. The summerized conclusion are as fallows ; 1) Specific gravity and the rate of water absorption were lowest when aggregate was covered by only surface-coating agent, especially, rate of absorption was about 10% of non-coating aggregate. 2) Coated-aggregate were about 0.87~0.97t/m3 and lightweight concrete made of coated-aggre¬gates were 1.80~ 1.94 t/m3 in unit weight. 3) Compressive strength of the lightweight concrete made of cement pasted-coating aggregate was about 200~215kg/crrl. 4) The higher the rate of water absorption of coarse aggregate, the higher the rate of deterioration of compressive strength.

Effect of Dispersion Method on Formation of Electroless Ni-CNT Coatings (분산법이 무전해 Ni-CNT 복합도금막 형성에 미치는 영향)

  • Bae, KyooSik
    • Journal of the Semiconductor & Display Technology
    • /
    • v.13 no.3
    • /
    • pp.51-55
    • /
    • 2014
  • Ni-CNT(Carbon Nanotubes) composite coating is often used for the surface treatment of mechanical/electronic devices to improve the properties of the Ni coating. For the Ni-CNT coating, the dispersion of CNT fibers is a critical process. In this study, ultrasonic treatment instead of the conventional ball milling was attempted as a dispersion method for the electroless Ni-CNT coating. SEM-EDX analysis was performed and contact angle, sheet resistance, and micro-hardness were measured. Results showed that the ultrasonic treatment was comparable to the ball milling, as a dispersion method, but the difference was negligible. However, combined ball milling and ultrasonic treatment(double treatment) showed much improved micro-hardness value, above 350Hv(close to the value obtained by the Ni-CNT electroplating). In addition, electroless Ni-CNT(double-treated) coatings formed on the thin Ni film deposited by the electroless plating(double coating) showed better mechanical properties. Thus, double treatment and double coating are suggested as an improved electroless Ni-CNT coating method.

Study of Manual Spray Coating Method for Fabricating Flexible Cantilever (유연성 높은 캔틸레버 제작을 위한 스프레이 코팅 방법 연구)

  • Kim, Ji-Kwan
    • Journal of Sensor Science and Technology
    • /
    • v.26 no.5
    • /
    • pp.366-369
    • /
    • 2017
  • This work presents a detailed study of several parameters on the spray coating method for fabricating a flexible cantilever. Conventionally, spin coating method have been widely used in the microelectromechanical system (MEMS) fabrication process. However, the major drawback of this method is the difficulties in protecting various topography with photoresist film, particularly when the device is manufactured in high aspect ratio. It is also a challenging process to form a small pattern in the etched area. On the other hand, the commercial spray coating systems are not advantageous from an economic perspective and the technique is also providing less efficient. In order to solve these issues, we have developed a manual spray coating system which can be efficiently used by combining the accessories available in the laboratory. The developed spray coating system consists of a spin-coater, motorized stage, a spray gun with the capable of controlling centrifugal force, injection amount, injection angle, and spray range. The major advantage of the proposed spray coating system is its reasonable fabrication cost. Secondly, the system can be easily disassembled after finishing the coating experiment. Owing to the mentioned advantages, we sincerely believe that the proposed spray coating system can be effectively used in many related applications.

PR Coating for Electron Beam Lithography of Cylindrical Mold and Measuring Coating Thickness of It using Measuring Tip (원통금형의 전자빔 가공을 위한 PR 코팅 및 측정 팁을 이용한 두께측정)

  • Lee, Seung-Woo;Kim, Jeong-O;Suh, Jeong
    • Journal of the Korean Society for Precision Engineering
    • /
    • v.29 no.10
    • /
    • pp.1144-1148
    • /
    • 2012
  • Process conditions for generating nano patterns handle different process according to the pattern characteristics, and different process data according to patterns in questions. To efficiently find optimal process conditions for generating nano patterns, process data by experiment is needed consideration of the pattern characteristics concerning the equipment. In particular, coating methods of a cylindrical mold differ from it of a flat plate because of viscosity of coating materials. Also the coating thickness affects nano process and pattern line width. So coating method of coating thickness for cylindrical mold is very important on nano pattern generating. In this study, a method is proposed for coating Photo Resist through the spray in order to coat cylindrical mold and measuring the thickness of coating using measuring tip considering the size of cylindrical mold because there is no method in the existing SEM. The proposed method is applied to a real printed electronics system to verify its accuracy and efficiency.

Optimization of the Plasma Spray Coating Parameters of Ni-5%Al Alloy Powder Using the Taguchi Experimental Method (다꾸찌방법에 의한 Ni-5%Al 합금 분말의 플라즈마 용사코팅 조건의 최적화)

  • 이형근
    • Journal of Welding and Joining
    • /
    • v.20 no.5
    • /
    • pp.120-126
    • /
    • 2002
  • Ni-5%Al alloy powder is widely used as the bond coating powder to improve the adhesive strength between the substrate and coating. The important properties in the bond coating are the deposition efficiency and surface roughness. In this study, it was tried to optimize the plasma spray parameters to maximize the deposition efficiency and surface roughness. In the first step, spray current and hydrogen gas flow rate were optimized in order to increase the deposition efficiency. In the next step, the seven plasma spray variables were selected and optimized to improve both the deposition efficiency and surface roughness using the Taguchi experimental method. By these optimization, the deposition efficiency was improved from about 10 % at the frist time to 51.2 % by the optimization of spray current and hydrogen gas flow rate and finally to 65.2 % by the Taguchi experimental method. The average surface roughness was increased from about $12.9\mu\textrm{m}$ to $15.4\mu\textrm{m}$.

Hydroxyapatite Coating on Ti Plate by a Dipping Method (침적법에 의한 수산화아파타이트 코팅 금속재의 기초적 연구)

  • Lee, Jun-Hui;Kim, Seok-Yeong;Kim, Yeong-Gon;Lee, In-Seop
    • Journal of Biomedical Engineering Research
    • /
    • v.18 no.3
    • /
    • pp.217-222
    • /
    • 1997
  • Hydroxyapatite(HA)-coated metal composites were made by the dipping method. The specimen substrates were Ti plates with a thickness of 2 mm. The HA coating was carried out in HA-sol for 1 min by the dipping method. The concentration of HA-sol for the coating ranged from 3.28 to 9.99 wt%. Excellent coating was observed on Ti substrate dipped once in 9.99 wt% sol. Preparation of Ti plates by sandblasting provided the better environment for coating HA on Ti surface than non-treated surface. As the concentration of sol increased, the weight change and the coating thickness increased. Above 7 wt% sol, they increased sharply.

  • PDF

Template Synthesis of $Ni(OH)_2$ nanowires by Electrochemical Process

  • Zhang, Wentao;Beili, Pang;Lee, Hong-Ro
    • Proceedings of the Korean Institute of Surface Engineering Conference
    • /
    • /
    • pp.68-68
    • /
    • 2008
  • There are several methods for oxide coating on metals, such as aluminum or carbon nanotubes(CNTs). Usually CVD method is introduced for various oxide coating on CNTs. Another method is electrochemical method which use potential-pH diagram for oxide coating on metal or CNTs. In this experiment, electrochemical coating parameter for oxide coating on aluminum template modified by acids and hydrogen peroxide ($H_2O_2$) were examined. SEM micrographs displayed clearly $Ni(OH)_2$ coating on template. For confirmation of electrochemical method application to EDLC electrode material fabrication, EDS spectrum was analyzed.

  • PDF

Effect of Coating Methods on the Properties of Poly(lactide)-coated Paperboard: Solution Coating vs. Thermo-compression Coating

  • Rhim, Jong-Whan
    • Food Science and Biotechnology
    • /
    • v.18 no.5
    • /
    • pp.1155-1160
    • /
    • 2009
  • Poly(lactide) (PLA)-coated paperboards were prepared by solution coating and thermo-compression coating methods and their effect of coating on the packaging properties such as tensile, water resistance, water vapor barrier, and heat sealing properties was tested. Compared with uncoated control paperboard, tensile strength (TS) of PLA-coated paperboard increased profoundly (2.2-2.6 folds) with slight increase in elongation at break (E). Water absorptiveness (WA) of the paperboard decreased 74-170 folds and water vapor permeability (WVP) decreased 6.3-22.1 folds by coating with PLA, which indicates an increase in the hydrophobicity of the surface of paperboard. Compared with polyethylene (PE)-coated paperboard, both PLA-coated paperboard exhibited 2.3 time higher heat sealing strength. In addition, the PLA-coated paperboards showed equal or higher wet TS than PE-coated paperboard. All the test results showed that the paperboard coated by the thermo-compression coating method was similar to or better than those of coated by the solution coating method.