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[Zer0]

По сути вопрос озвучен в "сабже".
Можно ли мыть электролиты в ультразвуке??
Мыл один раз - криминала не заметил...
Поделитесь пожалуйста.

[Семен]

Моем постоянно, ноу проблем (т.т.т.)

[Zer0]

Чем собственно является уплотнительная резинка электролита?
Надо полагать - газовыделительным клапаном.
Но вероятность попадания через него влаги не исключена,
тем более при УЗ отмывке. Подтвердите мои сомнения...

[Семен]

Вероятность, конечно, не исключена, но не забывайте, что прсле отмывки идет еще и сушка.

[Hans]

А не проще спросить какого-нибудь призводителя кондеров.

[Оксана]

Поднимала ТУ на некоторые конденсаторы отечественной сборки,
в кот. запрещалось мыть погружением в смесь.
Насчет импорта- не рисковала бы, по крайней мере, при возникновении необходимости не мешало бы ознакомиться с инфой от фирмы-производителя: рекомендации, герметичность корпуса.

[GraNiNi]

Zer0, если моете в органическом растворителе, то резинка может в нем набухать (растворяться).
Кроме того, в результате механического воздействия УЗ на оксидное покрытие анодных алюминиевых лент, возможно нарушение его целостности, результатом чего может быть повышенный ток утечки, или даже разбухание корпуса в результате газовыделения.
Неплохо бы сделать запрос производителю о возможности отмывки с использованием УЗ.

[Антон]

Вот, что удалось нарыть в data-sheet’ах на различные типы электролитов на предмет отмывки:

Aluminum Electrolytic Capacitors (Фирма «EPCOS»)

http://www.epcos.com/web/generator/Web/Sections/ProductCatalog/Capacitors/AluminumElectrolytic/PDF/PDF__GeneralTechnicalInformation,property=Data__en.pdf;/PDF_GeneralTechnicalInformation.pdf

Cleaning agents:
Halogenated hydrocarbons may cause serious damage if allowed to come into contact with Al
electrolytic capacitors. These solvents may dissolve or decompose the insulating film and reduce
the insulating properties to below the permissible level. The capacitor seals may be affected and
swell, and the solvents may even penetrate them. This will lead to premature component failure.
Because of this, measures must be taken to prevent electrolytic capacitors from coming into contact
with the solvents when using halogenated hydrocarbon solvents to clean printed circuit
boards after soldering the components, or to remove flux residues. If it is not possible to prevent
the electrolytic capacitors from being wetted by the solvent, halogen-free solvents must be used
in order to eliminate the possibility of damage.

Halogen-free solvents:
Ethanol (methylated spirits)
Propanol
Isopropanol
Isobutanol
Propylenglycolether
Diethyleneglycoldibutylether

Critical solvents:
The following list contains a selection of critical halogenated hydrocarbons and other solvents frequently
used, partially in pure form, partially in mixtures with other solvents, as cleaning agents in
the electrical industry.
Trichlorotrifluoroethane (trade names e.g. Freon, Kaltron, Frigene)
Trichloroethylene
Trichloroethane (trade names e.g. Chlorothene, Wacker 3)
Tetrachloroethylene (trade name: Per)
Methylenechloride
Chloroform
Carbontetrachloride
Acetone
Methylethylketone
Ethylacetate
Butylacetate

However, printed-circuit board cleaning equipment is available which uses halogenated solvents
but is designed to enable thorough cleaning in a very short time (four-chamber ultrasonic cleaning
process). Furthermore, the processes used ensure that virtually no solvent remains on the
cleaned parts.

This means that the general warning against the use of halogenated cleaning solvents on Al electrolytic
capacitors can be qualified if the following conditions are met:
1. The cleaning period in each chamber must not exceed 1 minute.
2. The final cleaning stage must use a solvent vapor only. The temperature must be 50 C or
lower.
3. Adequate drying must be ensured immediately after the cleaning process in order to evaporate
any condensed residual solvent.
4. Contaminated cleaning agents must be regularly replaced as specified by the manufacturer
and by legal regulations.

Solid Tantalum Electrolytic Capasitors (Фирма «Nichicon)

Cleaning
Please wash P.C. board as soon as possible after soldering process to eliminate flux, and acid and alkaline material.
In case of ultrasonic cleaning, attention should be paid to the following:
- Cleaning condition : Frequency=25~40kHz,
- Power=10~20W/r, Time = within 3 minutes.
- Do not allow a circuit board to touch the agitator.
- Do not stack circuit boards in the cleaning bath.

Aluminum Solid Electrolytic Capacitor Type ACA (Фирма «Matsuo Electric»)

Solvent Cleaning
Cleaning by organic solvent may damage capacitor’s appearance and performance.
However, our capacitors are not effected even when soaked at 20-30C 2-propanol for 5
minutes. When introducing new cleaning methods or changing the cleaning term,
please consult us.

Ultrasonic cleaning
Ultrasonic cleaning under severe condition may break terminals. Also, from an electrical
characteristics aspect, it is unfavorable. Therefore, please do not use ultrasonic
cleaning if possible. If the Ultrasonic cleaning process will be used, please note the
following.
The solvent should not be boiled. (Lower the ultrasonic wave output or use solvent
with the high boiling point.)
The recommended wattage is less than 0.5 watts per cm2.
The cleaning time should be kept to a minimum. Also, samples must be swang in
the solvent. Please consult us.

Non Solid Aluminium Electrolytic Capasitors (Фирма «Nic Components»)

CLEANING AGENTS AND CONDITIONS
a.) Most of NIC electrolytic capacitors have anti-solvent properties which can withstand such halogenated agents as Freon TE, TES, TMS, TP-35 or Daifron
S3-E, S3-ES, S3-P35, by the cleaning methods, immersion, vapor, spraying or ultrasonic at a maximum temperature of 40°C.
b.) Chlorine-based cleaners; such as as Trichloroethane and Trichloroethylene, can not be used.
c.) Flux or adhesives for fixing capacitors on the PCB, containing chlorine, can not be used.
d.) Care should be taken when water washing under pressure to minimize shrinking or swelling of the insulation sleeve.
If in doubt or uncertainty, please review with NIC's technical support personnel

Общий вывод: мыть в ультразвуке можно, только осторожно (с учётом допустимой мощности звукового генератора, максимального времени воздействия ультразвука и температуры моющего раствора) + правильный выбор моющего состава.
_________________
Электроника - наука о контактах.

[Zer0]

Спасибо за советы.
Буду мыть. О результатах позже...

[Zer0]

конденсаторы ELZET
промывка в УЗВ -> продувка сжатым воздухом -> сушка
всё работает

[Антон]