Electrolysis Ė cleaning finds.
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Power supply (or car battery charger) 12V, best
one to have is with a voltage control.
And at least the capability of producing at least
1 to a maximum of 7 amps.
- Two power cords
(the best types are the alligator clips.)
A piece of iron to act as an electrode (do not use anything other
that scrap due to the fact it will be destroyed during the
- Salt or NaOH,
Some plastic vessel (not metal) and large enough to
fit the item you are cleaning
Thing you want to
clean (see the photo)
Electrolysis doesnít removes
original oxide, but removes paint!
process produces HYDROGEN, so you must insure your work space has
cables to your power supply. Connect the positive (+) to your
electrode (keeping in mind again that it will be consumed during the
process). The best electrode is some active metal such as iron or
zinc. Now connect the negative terminal (-) to the object you are
attempting to clean. Itís very important to provide good contact
point so be sure to scrape away some of the rust to allow a good
point of contact.
Now you have
to prepare electrolyte. The easiest is water. Pour into it some
table salt (NaCl) or NaOH. You have to dissolve so much salt as you
can. Table salt is safer, because it is not caustic. Whereas, NaOH
is extremely caustic, as to cause serious bodily injury, so remember
YOU HAVE TO BE VERY CAREFUL!!
Once you have
prepared the electrolyte, place the electrode (+) and your item you
want to clean with the electrode (-) connected. They cannot be in
direct contact with each other!
Turn on the
power. From the item you are cleaning, you should see a flow of
bubbles. If they are flowing only from clip, you must check the
point of contact. If bubbles are flowing from the entire object you
are cleaning, everything is OK. If they are flowing from electrode,
you must quickly change the polarity (+ and -). If use NaOH,
bubbles will flow from electrode and the item you are attempting to
clean, so you must be sure that you made your connections properly,
and polarity is correct. This process gives off oxygen (that which
accelerates rusting); on item you are cleaning it will give off
hydrogen, so itís really important to insure that your workspace is
properly ventilated. (Hydrogen and oxygen is very explosive).
Now, on the
subject the intensity of the current that you are applying. If
intensity is low (~1 A), this process will take a long time. If
intensity is higher (>4 A), it will be quicker. Past experience has
shown that the optimal intensity is 7 A per 100 cm2 of
area. The entire process will take anywhere from a few hours up to
few days, depending of rust intensity and current you are using. You
have to be careful to not blow out your power supply. Itís good to
clean youíre your item with a metal brush from time to time to help
speed along the process. It is also recommended to replace the
electrolyte from time to time. Again experience will be the judge.
all for this subjectÖ If you have any questions, please mail me.
How do you
remove rusted screw from the magazine in Mauser 98k?
hammer, pliers, screwdriver.
turn the rifle
over, with the magazine facing upwards. Using the hammer, hit close
to the rear screw until rear screw wonít be loose. By the way should
break small guard screw. Now remove the screw cover Ė its thin sheet
metal. Next, grasp the screw with pliers (between magazine and bolt
chamber) and unscrew it. To unscrew the front screw, you must bend
the magazine (close to screw). Do it like the magazine wonít accost
the trigger and turn it few times (unscrew). After you bend it back
you knock out the front screw with a hammer (using this procedure
you shall break the second guard screw). By utilizing this procedure
you will save original screws, and most importantly you minimize the
chances of damaging your rifle. This, in my opinion is better
option, than sawing and drilling screws off.