SU89731A1 - Test method for coating chemical equipment using electric current - Google Patents

Test method for coating chemical equipment using electric current

Info

Publication number
SU89731A1
SU89731A1 SU400404A SU400404A SU89731A1 SU 89731 A1 SU89731 A1 SU 89731A1 SU 400404 A SU400404 A SU 400404A SU 400404 A SU400404 A SU 400404A SU 89731 A1 SU89731 A1 SU 89731A1
Authority
SU
USSR - Soviet Union
Prior art keywords
electric current
test method
defects
chemical equipment
coating chemical
Prior art date
Application number
SU400404A
Other languages
Russian (ru)
Inventor
Н.Н. Козловский
В.М. Цнель
В.И. Шляпников
пников В.И. Шл
Original Assignee
Н.Н. Козловский
В.М. Цнель
В.И. Шляпников
пников В.И. Шл
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 Н.Н. Козловский, В.М. Цнель, В.И. Шляпников, пников В.И. Шл filed Critical Н.Н. Козловский
Priority to SU400404A priority Critical patent/SU89731A1/en
Application granted granted Critical
Publication of SU89731A1 publication Critical patent/SU89731A1/en

Links

Landscapes

  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Description

Дл  обнаружени  дефектов в эмалевом покрытии химической аппаратуры обычпо примен етс  так называемый электролитический способ, заключающийс  в том, что в испытуемую аппаратурз заливают электролит и к электролиту и к металлическому корпусу испытуемого аппарата подвод т ток. При этом в местах дефектов покрыти  происходит замыкание электрической цепи. Недостатком этого способа  вл етс  длительность операции и невозможность обнаружить тончайшие дефекты покрыти .In order to detect defects in the enamel coating of chemical equipment, a so-called electrolytic method is used, which consists in that electrolyte is poured into the equipment under test and a current is applied to the metal body of the device under test. At the same time, in places of coating defects, an electrical circuit is closed. The disadvantage of this method is the duration of the operation and the inability to detect the finest defects of the coating.

Предлагаемый способ позвол ет работать значительно быстрее и вы вл ть мельчайшие дефекты эмалевого покрыти  (волос ные треш,ины, пузырьки и т. п.). Отличие этого способа заключаетс  в использовании дл  1 спытани  тока высокой частоты и высокого напр жени . В местах дефектов возникает дуга разр да с характерным налетом, остающимс  на исследуемой поверхности после испытани .The proposed method makes it possible to work much faster and to reveal the smallest defects of the enamel coating (hair trash, ions, bubbles, etc.). The difference with this method is in the use of high frequency and high voltage for one test. In places of defects, an arc of discharge occurs with a characteristic deposit that remains on the surface under investigation after the test.

Способ осуществл етс  следующим образом.The method is carried out as follows.

На угольный электрэд подаетс  переменное напр жение 4000 - 8000 (1 с частотой 65000 гц, которое может быть получено, например, от сети переменного тока при помощи зуммерного преобразовател  и катушки Тесла. Угольны.м электродом провод т по эмалевой поверхности, причем между ним и поверхностью эмали образуетс  начальна  стади  коронного разр да, сопровождающа с  фиолетовым свечением п искровыми разр дами. Напр жение, даже максимальное (8000 б), ие наносит никаких повреждений эмали, так как пробивное напр жение последней 23600 , а толщина эмалевого сло  обычно составл ет 0,7 - 1 мм. При наличии в эмали таких дефектов, как пор, трещин, пузырей или недопустимо тонкого сло  эмали (пор дка 0,1 - 0,3 мм, в местах дефектов, в момент проведени  ио иим электродом, образуетс  переход от коронного и искрового разр да в область дугового разр да, сопровождающегос  искрами белого цвета, точно указывающими место дефекта.A coal electric voltage is supplied to an alternating voltage of 4000-8000 (1 with a frequency of 65000 Hz, which can be obtained, for example, from an alternating current network using a buzzer and a Tesla coil. An angle electrode is conducted along the enamel surface and between The enamel surface forms the initial stage of the corona discharge, which is accompanied by a violet glow and spark discharges. The voltage, even the maximum (8000 b), does not cause any damage to the enamel, since the breakdown voltage of the last 23600 It is usually between 0.7 and 1 mm. If there are defects such as pores, cracks, bubbles or an unacceptably thin layer of enamel in the enamel (on the order of 0.1-0.3 mm, in the places of defects, at the time of the electrode forms a transition from the corona and spark discharge to the area of the arc discharge, accompanied by sparks of white color, accurately indicating the location of the defect.

.ь 89731- 2 .in 89731-2

Помимо искры белого цвета, дуговые разр ды обычно сопровождаютс  сильным треском. В местах дефектов, в момент дуговых разр дов, образуетс  белый налет, который остаетс  после испытани  и точно указвь вает места дефектов.In addition to the white spark, arc discharges are usually accompanied by a strong crack. In places of defects, at the moment of arc discharges, a white bloom is formed, which remains after the test and accurately indicates the places of defects.

В цел х безопасности заземл ют корпус испытуемого издели , надевают резиновые перчатки и боты и только после этого берут в руки эбонитовую ручку электрода и включают высокое папр жение.For the sake of safety, the body of the test article is grounded, rubber gloves and boots are put on and only after that the ebonite handle of the electrode is taken in hand and a high tension is applied.

Испытание предлагаемым способом эмалированного издели  емкостью 3 . занимает 15-20 мин. и дает полную гарантию должной нроверк качества его покрыти .The test of the proposed method enameled product capacity of 3. takes 15-20 minutes and gives a full guarantee of the proper verification of the quality of its coating.

Предмет изобретени Subject invention

Способ испытани  покрыти  химической аппаратуры при помощи электрического тока, отличающийс  тем, что дл  обнаружени  мельчайших дефектов (волос ные трещины, пузырьки и т. н.) и их визуального наблюдени  примен ют ток высокой частоты и высокого напр женид ,. подключаемый к угольному электроду, которым провод т по испытуемой поверхности, в результате чего в местах дефектов возникают дуги и остаетс  характерный налет на поверхности, позвол ющий устанавливать места дефектов.The method of testing chemical equipment using electric current, characterized in that for detecting the smallest defects (hairline cracks, bubbles, etc.) and their visual observation, a high-frequency current and high voltage are used. connected to the carbon electrode, which is conducted on the surface to be tested, as a result of which arcs appear in places of defects and there remains a characteristic deposit on the surface, which allows to establish the places of defects.

SU400404A 1949-07-12 1949-07-12 Test method for coating chemical equipment using electric current SU89731A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU400404A SU89731A1 (en) 1949-07-12 1949-07-12 Test method for coating chemical equipment using electric current

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU400404A SU89731A1 (en) 1949-07-12 1949-07-12 Test method for coating chemical equipment using electric current

Publications (1)

Publication Number Publication Date
SU89731A1 true SU89731A1 (en) 1949-11-30

Family

ID=48260914

Family Applications (1)

Application Number Title Priority Date Filing Date
SU400404A SU89731A1 (en) 1949-07-12 1949-07-12 Test method for coating chemical equipment using electric current

Country Status (1)

Country Link
SU (1) SU89731A1 (en)

Similar Documents

Publication Publication Date Title
EP2228818A3 (en) Method for monitoring plasma discharges
Liu et al. Recurrent plot analysis of leakage current in dynamic drop test for hydrophobicity evaluation of silicone rubber insulator
DE69018193D1 (en) Method and apparatus for examining the condition of an insulation system.
SU89731A1 (en) Test method for coating chemical equipment using electric current
US5455507A (en) Method and apparatus for detecting leaks in electrically-insulative protective articles such as condoms, surgical gloves and the like using gaseous electrostatic ions
RU2724991C1 (en) Method for determining technical state of insulation of a digital transformer based on partial discharge parameters
Starikova et al. Control of cable insulation quality by changing of electrical capacitance per unit during high voltage testing
Liu et al. Experimental study on UHF pattern of partial discharges in transformer bushings
JP3849043B2 (en) Discharge device
SU363054A1 (en) METHOD OF MONITORING THE QUALITY OF ISOLATION OF THE SECURITY ———- l ^ lT ..: "'WASHING OF ELECTRIC MACHINES
Hozumi et al. Time-lag measurement of void discharges for the clarification of the factor for partial discharge pattern
Hartje et al. Reproducibility of partial discharge measurements on surface discharges according to IEC 60270 at dc and ac voltages
Walczak Method for vacuum state evaluation based on analysis of dynamics changes of electron field emission current and X-radiation in time
Zouaghi et al. Analysis of Corona and Surface Discharge Signals from Different Non-Intrusive Sensors under HVDC
Morales et al. Analysis of Currents in Dielectric Gloves due to Medium Voltage Surges
Ma et al. Study on Characteristic Parameters and Influencing Factors of Leakage Current of Polluted Porcelain Insulators
ATE1615T1 (en) METHOD AND DEVICE FOR QUALITY TESTING OF CERAMIC COMPONENTS.
SU133123A1 (en) Method for detecting pores or small holes in films or thin coatings of dielectric material
JPH04172241A (en) Apparatus for measuring corrosion underneath paint film
RU2745446C1 (en) Method for controlling and repairing wire insulation
Rozga et al. Numerical analysis of electrical field surrounded the model HV electrode setups with paper insulation immersed in oil
EP2707704B1 (en) Method of analyzing a material
Zhou et al. Influences of frequency on space charge formation in polyethylene under high voltage AC electric fields
SU119934A1 (en) A method of registering internal partial discharges and corona in dielectrics under constant voltage and a device for carrying out this method
JP2001108660A (en) Method and apparatus for inspecting film