electroless tinning - Electronic Circuits Projects Diagrams Free

sam2 · 6th February 2007, 12:09 AM

I read an artical on line that described plating PCB's using tinning crystals.
The artical said it was a simple procedure that worked very well.
The only thing it did not mention was where to get them, or a brand name. Does anyone know about this?
thanks sam

mramos1 · 6th February 2007, 12:19 AM

allelectronics.com I think has it. Seach the web for tinnit (or go to allelectronics.com and search there).

It is a powder (for shelf life). The $10 pack will do a pint, you drop the board in and 5 minutes it is tinned. It is more of a chemical process.

EDIT: http://www.allelectronics.com/cgi-bi...IN_PLATE_.html

sam2 · 6th February 2007, 12:36 AM

Thanks mramos1. I also fond this there http://www.alliedelec.com/Search/Pro...C6738077F4E17F
Sam

mramos1 · 6th February 2007, 12:50 AM

I used the liquid type in the past and it lasted for some time (a long time just took longer to tin).

But the power should last longer as it is a powder. Also, you can do as little as you want and put it in a bottle and use it over and over.

I have only used the liquid, but the powder does seem to sound better. I have not tried it.

Maybe someone else has some input.

bananasiong · 6th February 2007, 02:06 AM

I thought use solder to do tinning?

mramos1 · 6th February 2007, 02:55 AM

Quote:

Originally Posted by bananasiong

I thought use solder to do tinning?

You can do that too. This tins the whole board.

bananasiong · 6th February 2007, 03:13 AM

I've tried tinning with solder, if i give too much heat to the pcb, some oil (I don't know what to call) makes the solder not to stick on the metal on the pcb.

bitem2k · 6th February 2007, 08:54 AM

Are you talking about the flux?

mramos1 · 6th February 2007, 11:40 AM

Bitem2K:

No, this is a liquid you drop in the PCB after etching and the whole PCB gets tinned.

See the link, it should have more information on it.

BeeBop · 6th February 2007, 05:09 PM

I've used the liquid tin too. Highly toxic, carcinogenic, and corrosive sh*t! Be really careful with it, and dispose of waste in a responsible manner. Although I'm a tough old codger, the fumes from this leave me gagging.

Be CAREFUL!

Sceadwian · 7th February 2007, 06:55 AM

bananasoing, it's called oxides =) If the oxides are causing the solder joint to be difficult to make you're not using flux. Flux is a cleaner and protector for the joint under formation that prevents it from being exposed to air so that oxides don't form and ruin it, it also decays rapidly under heat. Most solders have a resin core which acts as flux the first time round, subsequent heatings require flux paste to be applied or the joint quickly deteroriates with exposed to the air heating, oxidizing it internally and make it brittle.

The exact same thing happens during stick welding, a sacrificial flux resin is on the outside of the stick of metal to be welded preventing it from coming into contact with the air.

bananasiong · 8th February 2007, 12:38 AM

Quote:

Originally Posted by Sceadwian

bananasoing, it's called oxides =) If the oxides are causing the solder joint to be difficult to make you're not using flux. Flux is a cleaner and protector for the joint under formation that prevents it from being exposed to air so that oxides don't form and ruin it, it also decays rapidly under heat. Most solders have a resin core which acts as flux the first time round, subsequent heatings require flux paste to be applied or the joint quickly deteroriates with exposed to the air heating, oxidizing it internally and make it brittle.

The exact same thing happens during stick welding, a sacrificial flux resin is on the outside of the stick of metal to be welded preventing it from coming into contact with the air.

OIC, thanks. I thought the flux is used only to make the solder to flow smoother.

chemelec · 8th February 2007, 03:22 PM

There is also an "Electrolysis Nickel Plating Solution".

It Gives a Much Better coating than Tin, and with less Oxidation over time.

Unfortunately its a Commerical Product and harder to buy in small quantities.

A Professional Plating company MIGHT give you a bit.

Sceadwian · 9th February 2007, 06:33 AM

I have never heard of nickle plateing a PCB it's a crappy material to solder to. If you need corrosion resistance tin the board, solder it then coat it with a spray sealer.

chemelec · 9th February 2007, 02:30 PM

Quote:

Originally Posted by Sceadwian

I have never heard of nickle plateing a PCB it's a crappy material to solder to. If you need corrosion resistance tin the board, solder it then coat it with a spray sealer.

I Think you should try it Sometime.
Nickel Solders VERY Well with a Tin/Lead Solder.

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6th February 2007, 12:09 AM	(permalink)
sam2	electroless tinning I read an artical on line that described plating PCB's using tinning crystals. The artical said it was a simple procedure that worked very well. The only thing it did not mention was where to get them, or a brand name. Does anyone know about this? thanks sam Last edited by sam2; 6th February 2007 at 12:42 AM.

6th February 2007, 12:19 AM	(permalink)
mramos1	allelectronics.com I think has it. Seach the web for tinnit (or go to allelectronics.com and search there). It is a powder (for shelf life). The $10 pack will do a pint, you drop the board in and 5 minutes it is tinned. It is more of a chemical process. EDIT: http://www.allelectronics.com/cgi-bi...IN_PLATE_.html

6th February 2007, 12:36 AM	(permalink)
sam2	Thanks mramos1. I also fond this there http://www.alliedelec.com/Search/Pro...C6738077F4E17F Sam

6th February 2007, 12:50 AM	(permalink)
mramos1	I used the liquid type in the past and it lasted for some time (a long time just took longer to tin). But the power should last longer as it is a powder. Also, you can do as little as you want and put it in a bottle and use it over and over. I have only used the liquid, but the powder does seem to sound better. I have not tried it. Maybe someone else has some input.

6th February 2007, 02:06 AM	(permalink)
bananasiong	I thought use solder to do tinning? __________________ Superman returns..

6th February 2007, 03:13 AM	(permalink)
bananasiong	I've tried tinning with solder, if i give too much heat to the pcb, some oil (I don't know what to call) makes the solder not to stick on the metal on the pcb. __________________ Superman returns..

6th February 2007, 08:54 AM	(permalink)
bitem2k	Are you talking about the flux?

6th February 2007, 11:40 AM	(permalink)
mramos1	Bitem2K: No, this is a liquid you drop in the PCB after etching and the whole PCB gets tinned. See the link, it should have more information on it.

6th February 2007, 05:09 PM	(permalink)
BeeBop	I've used the liquid tin too. Highly toxic, carcinogenic, and corrosive sh*t! Be really careful with it, and dispose of waste in a responsible manner. Although I'm a tough old codger, the fumes from this leave me gagging. Be CAREFUL!

7th February 2007, 06:55 AM	(permalink)
Sceadwian	bananasoing, it's called oxides =) If the oxides are causing the solder joint to be difficult to make you're not using flux. Flux is a cleaner and protector for the joint under formation that prevents it from being exposed to air so that oxides don't form and ruin it, it also decays rapidly under heat. Most solders have a resin core which acts as flux the first time round, subsequent heatings require flux paste to be applied or the joint quickly deteroriates with exposed to the air heating, oxidizing it internally and make it brittle. The exact same thing happens during stick welding, a sacrificial flux resin is on the outside of the stick of metal to be welded preventing it from coming into contact with the air. __________________ "Because I be what I be. I would tell you what you want to know if I could, mum, but I be a cat, and no cat anywhere ever gave anyone a straight answer, har har."

8th February 2007, 03:22 PM	(permalink)
chemelec	There is also an "Electrolysis Nickel Plating Solution". It Gives a Much Better coating than Tin, and with less Oxidation over time. Unfortunately its a Commerical Product and harder to buy in small quantities. A Professional Plating company MIGHT give you a bit. __________________ I No Longer accept Private Messages on here. All Emails to me Must Contain the Word \"Electronic\" in the \"Subject Line\" or they go Directly to my Junk Mail Folder. Email me at: chemelec@hotmail.com Website: http://www3.telus.net/chemelec

9th February 2007, 06:33 AM	(permalink)
Sceadwian	I have never heard of nickle plateing a PCB it's a crappy material to solder to. If you need corrosion resistance tin the board, solder it then coat it with a spray sealer. __________________ "Because I be what I be. I would tell you what you want to know if I could, mum, but I be a cat, and no cat anywhere ever gave anyone a straight answer, har har."