Putting back Electrical Spray after soldering?

[Fizzycapola]

I noticed after continually washing some electricals for the "fun of it" that the areas I reworked with my soldering iron starting to get a bit rusty.

Which got me thinking, maybe I can spray back on the waterproof stuff that was there before I took an iron to it...

I see alot of different cans of electrical sprays in the shops, I wonder what you recommend (these electricals are kept in the home where people are already quite sensitive to 'wandering chemicals').

Regards.

[starfury1]

Re: Putting back Electrical Spray after soldering?

there is spray stuff you can buy that coats the pcb
usually costs a bit $$

Id try Rs components farnells or probably Mapps? is it
I think your in that neck of the woods

Servisol pcb Lacquer

Circuit Board Lacquer Spray Can

Non CFC Ozone safe propellant. Premium quality flexible coating to protect printed circuit boards from humidity and environmental attack. Special solder through lacquer so previously coated boards can be soldered.

at Jaycar ( Cat NA1002)
Here

Maybe one of our members know the cheap but effective way of what to use.

HTH m8

Cheers

[Fizzycapola]

Re: Putting back Electrical Spray after soldering?

Thanks for the fast reply starfury1


That looks like a good starting point I see it's hazardous in it's spray form, including chronic problems from small dosages, ideally I'd like a product with minimal health implications, maybe "medical grade / food grade" or something used in surgical equipment electricals, as I might want to repair my friends computer sometime he already has alot of lathargic chronic / non-fatal non-treatable terminal illnesses (just woke up with them one day) I feel the slightest moderate toxin would be like 1ppm ingestation of polonium to him.

Price not an issue.

Jaycar ( Cat NA1002)
HAZARD RATINGS
Flammability: 4
Toxicity: 2
Body Contact: 2
Reactivity: 0
Chronic: 2
SCALE: Min/Nil=0 Low=1 Moderate=2 High=3 Extreme=4

[999999999]

Re: Putting back Electrical Spray after soldering?

Coatings on medical circuit boards, or other parts, or food products, are also hazardous before set, or somewhat hazardous while being applied and/or set (powdercoat, etc) depending on what you're talking about. The carrier may be toxic, but that evaporates. Such evaporative carrier coatings aren't generally used at all on anything having direct contact with food, your needs are different.

Spray the proper product outside or with a good fume extractor ventilation system, or use a non-spray product that still should be left out of living quarters until fully evaporated, else you will only have poor performing alternatives like water based acrylic paint. If this person is really frail and susceptible to allergies from common products, it may be important to have that checked by a proper allergist for general health needs, regardless of the rework scenario and desire to coat it as expressed here.

We don't know what area you're talking about covering but some methods don't produce so many fumes as others, for example a conformal coating pen is a bit like a sharpie marker, far less obtrusive than a spray can but obviously meant only for small areas.

[Fizzycapola]

Re: Putting back Electrical Spray after soldering?

Talking about his computer, I do his basic maintenance for him.

I like your suggestion to apply non spray version, like painting lots of very thin fine quick drying layers I'm thinking. ESP living in the UK where space is tight and work more expensive than gold bars per square foot, the chances of the spray hitting someone in the face probably too high even in a miniature workshop if that could even be afforded. I'll most likely do it in the countryside or something especially to ease my conscience.

He's not so poorly really (not awaiting death as it were just your average chronic immune deficiencies etc), I just want him to have the best chances of recovery, so he gets to live again like I knew him before his condition and actually have a real life to have sex and get a nice job stuff like that before dieing as it were (surely all the fun can't just be for the scurges/morons/criminals/sillybilly's/racially prejudist foreign country stealers -.o), with all angles covered to full extent of all known sciences that I know of.

So when I see something say hazardous maybe I over-react "one mans poison is another mans deadly poison in the world of weakend immune systems". I'm sorry for this if it's how it looks. I do tend to use my own brand of language with unnecessarily dramamic usage for effect - too many movies mixed with science magazines me.

[stevo1210]

Re: Putting back Electrical Spray after soldering?

If the area is small, you could use clear nail polish I guess??
That's the only thing that I can think of that's probably safe for human health.

[Fizzycapola]

Re: Putting back Electrical Spray after soldering?

Good thinking stevo. Thanks for your suggestion will bear in mind aswell as starfury's kind suggestion. The area would likely be the common failure groups around CPU (about the expanse of a adult human hand). Thanks again 999999999 I had spray solutions on the brain before your post. [This is a very forward thinking post (probably a minimum of a good year plus if failure will even occur this way) of mine as usual anyway. No rush, contribute if you feel like it.] Thanks in advance.

[999999999]

Re: Putting back Electrical Spray after soldering?

Nail polish is usually something like nylon or acrylic plus acetone or some other highly evaporative solvent which is also bound to be a little toxic, but not vaporized at such a great rate as from a spray can. Some hypersensitive people may think nail polish makes them sick, but I don't know enough about the effects to know if that's purely physical or psychological effect.

I don't understand why soldering around the CPU area of a motherboard would make it rust. These areas should have plated holes or pads which are then retinned when soldering the new part on.

[kc8adu]

Re: Putting back Electrical Spray after soldering?

i dont see why it matters anyway.
motherboards are not conformal coated.
and nobody washes the inside of a pc.

[Fizzycapola]

Re: Putting back Electrical Spray after soldering?

I don't understand why soldering around the CPU area of a motherboard would make it rust. These areas should have plated holes or pads which are then retinned when soldering the new part on.

Water, oxidisation and chemical attacks (this one is from Japanese advice) from my Marlboro.

[Pomposity]
As I'm not going to give up smoking ( mum says I have addictive personality), I think regularly washes to keep my PC smelling like roses is best as long as it's possible.


( Additionally it'll give me more to do, to keep off the streets out the way of the busy drug dealers [(last I heard they upset that there are people that don't want to pretend they're vacuum cleaners/numerious occassions I've had - what I assume are their representatives asking if I'm paying for something?!?! and acting angry following me and doing death gestures (once? can't these people be locked up!) - seems like they're resorting to psychoengineering themselves free money forcefully these days)] burning their "from Bin Laden Co" Gas in their Italian built in Italy Lamborghini's impressing my childhood girlfriends comfortably in their Italian tailored suits fear of hard working honest reality attacking them.)

[Fizzycapola]

Re: Putting back Electrical Spray after soldering?

Local store sells Servisol range:

Plastic Seal 60 Servisol 200Ml (Protective Insulator) (250oC rated) Spray
http://www.chsinteractive.co.uk/elec...-insulator.htm
Substances:
LPG
Heptane
Xylene
Butanol

No particularly worrying chronic hazard/cancer threat like the Aus stuff, maybe they're just more honest in their spec sheet.

Good to buy?

[gonzo0815]

Re: Putting back Electrical Spray after soldering?

The plastic isn`the problem, only the solvent. So if it is cured, it should be ok.

[999999999]

Re: Putting back Electrical Spray after soldering?

Water, oxidisation and chemical attacks (this one is from Japanese advice) from my Marlboro.

These coatings are meant to be put on bare, oxidizable metal. Unless you'd scraped the lacquer off the surrounding copper traces or planes, there should be no need for another coating except perhaps if you had a very tough to solder joint and the heat cooked away a very small portion around the solder joint itself. In that case, a spray would be overkill, and potentially problematic because you already have all those metal connectors on the board that cannot be exposed to any of these sprays. In this case a marker, or even nail polish only on the area needing it, is a far better option.

[Pomposity]
As I'm not going to give up smoking ( mum says I have addictive personality), I think regularly washes to keep my PC smelling like roses is best as long as it's possible.

If you smoke, how is this not in the air and pretty much negating what a PC sitting in same air smells like? The problem with tobacco smoke is that it deposits gummy coatings (which also attract dust), which interfere with electrical contacts. It is actually going to be a (though unattractive and not nearly as good at the job) a similar protective coating as anything else would be, protecting the area it is covering from water (why would there ever be water unless you have a water cooling setup that leaks?). Even so, I think a room air cleaner is best to reduce smoke levels and you need no spray to protect from smoke because it won't protect, can't get on the bare metal contacts which the tarry smoke is a problem on. Some coatings could also interfere with cleaning off the smoke with certain solvents, depending on what you're using.

( Additionally it'll give me more to do, to keep off the streets out the way of the busy drug dealers [(last I heard they upset that there are people that don't want to pretend they're vacuum cleaners/numerious occassions I've had - what I assume are their representatives asking if I'm paying for something?!?! and acting angry following me and doing death gestures (once? can't these people be locked up!) - seems like they're resorting to psychoengineering themselves free money forcefully these days)] burning their "from Bin Laden Co" Gas in their Italian built in Italy Lamborghini's impressing my childhood girlfriends comfortably in their Italian tailored suits fear of hard working honest reality attacking them.)

Might be more info than we needed. One of three things might be true:

- You need to move, relocate, hit the road jack, take the bus gus.

- Before spraying anything, you're already suffering from some kind of toxic psychosis.

- You need to have a talk with your local police about what they're doing to address this, and encourage your neighbors to do the same.

I think spraying circuit boards is an unnecessary diversion from the problem, a distraction that isn't going to have any long lasting benefit.

[Fizzycapola]

Re: Putting back Electrical Spray after soldering?

Your analysis's are pretty much right on the money in my best judgement and appreciated. I phoned the cops and they said they'll take care of my problems for me, I feel alot safer already.

Back to the subject matter ...

"you already have all those metal connectors on the board that cannot be exposed to any of these sprays."

Ok now I'm worried again lol ...

I'm looking to replace the coatings that have been melted away (in a thermal blast radius kind of way if you can imagine) at each area where the overly aggressive 60w iron has melted away the coating to work the solder areas.

So to achieve as near-as-possible the state the board was in before removing the junk and slotting in the good stuff, as it were. It may not be necessary or serve a purpose but it's the way I'd like it to look.

[999999999]

Re: Putting back Electrical Spray after soldering?

Try a conformal coating pen/marker and a lower wattage soldering iron.