How to Save Money When Buying Tin plating process

I'm wondering if tinned copper busbars are literally what it says on the tin(!) or are there special processes / materials invovled. I'm thinking of making tinnned copped busbars at home with electrolysis, mostly because it would be fun and less to save money. If I achieve a nice tin coat on a copper plate, would it be expected to conduct as well as an industrially manufactured busbar?

I'm no expert, but as I understand it is the copper that does the conducting, and would conduct just as well without tinning, but the tinning stops the copper oxidising, which is unsightly and has to be cleaned off the relevant area if one wants to make any new connections later. The copper won't oxidise between the busbar and whatever is clamped or soldered to it, due to lack of oxygen.

I guess the copper that's oxidised will in principle reduce the cross section of the bus bar available for conducting, but that'd be negligible.

(Happy to be corrected if I'm mistaken.) Its not quite like an experiment at school, where perfection (at school) is not required nor absence of - noticed.

Don't lose sight of post 2 where it is pointed out the coating will be less than satisfactory if you do not get the surfaces scrupulously clean. (Similar to anodising aluminium) before you coat with tin (and then don't touch it except with gloves or handle with clean tongs (or whatever). Finger grease is a killer. You don't make clear your overall intention but I would drill the bus bar for the connectors before I tinned the bar. If you are making a bus bar it seems unlikely you will only need one. If you need one you probably need 2 - then make at the same time.

I was not as impressed as you with school electroplating (and it was a very long time ago) but I did some anodising recently. I don't recall electroplating voltage but for anodising its 12v and I simply used a battery charger. You end up, with anodising, with a lot of acid - plan how you will dispose of same - in advance. I bottled and labelled mine for next time (so far there has not been a next time ).

Jonathan

Do you know what is tinning of PCB? Do you know how to tin a PCB? PCB tinning refers to the process of covering copper traces with layers of tin so as to protect them from oxidation and corrosion? In addition, the tinning process also masks copper as the circuit board gets etched. Usually, printed circuit boards have wires that carry electronic charges with them. One of the conductors used in these circuit boards is copper.

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So, PCB tinning goes a long way to enable copper traces to remain in good shape and functionality for a long time. And if you are going to learn the professional knowledge of PCB tinning, please check and read the passage for more information.

1.What are the advantages of PCB Tinning?

The industrial method of manufacturing printed circuit boards uses strong solvents like sodium sulfate. Doing this simplifies the manufacturing process and also prevents unwanted etching. Tinning will facilitate this since the risk of corrosion is much lower when a printed circuit board is tinned.

Also, the cost of placing copper traces with higher thickness levels on circuit boards with small current areas is much higher than usual. It is another reason why PCB tinning is preferable; it will save money, especially when there is a high existing path bridge.

2.What are the disadvantages of PCB Tinning?

· Very sensitive to handling &#; gloves must be used

· Exposed Tin on final assembly can corrode

· Not good for multiple reflow/assembly processes

· Aggressive to soldermask &#; soldermask dam should be more than 5mil

· Baking prior to use can have a negative effect

3.What are the instructions of PCB Tinning?

Chemical immersion tin is a widely used PCB surface treatment process. Its working principle is to change the chemical potential of copper ions to cause the stannous ions in the plating solution to undergo a chemical substitution reaction, which is an electrochemical reaction. The reduced tin metal is deposited on the surface of the copper substrate to form a tin plating layer. The metal complex adsorbed on the immersion tin plating layer catalyzes the reduction of tin ions to metallic tin, so that the tin ions continue to be reduced to tin. The reaction equation is 2Cu+4TU+Sn2&#;2Cu+(TU)2+Sn.

Chemical immersion tin is a PCB copper surface treatment technology. The products of this process will neither contaminate the solder (unlike chemical nickel-gold board) nor produce an additional polyester layer on the solder mask. The method can be evenly covered with a layer of tin in any size PCB hole and the position of the connection plate. To adapt to the global strategic development, gradually realize the needs of lead-free and the development of the PCB market, use lead-free chemical precipitation. The replacement of the current hot air leveling process with tin technology has become a prerequisite for DPMC&#;s development plan.

4.How to tin a PCB step by step?

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You will need the following:

· Your circuit board &#; after etching and before drilling*

· Acetone/nail varnish remover

· A large flat bastard-cut file

· A wire brush

· A small tub of brown flux jelly

· A small lump of tin/lead solder

· Gloves, paper tissues/clean rags, etc

· A 25W soldering iron with a largeish (say 5mm) chisel tip in good condition

· A clean sheet of white A4 paper

5.How to tin PCB at home?

All of the above information points out that DIY PCB tinning is not only possible, but it also is not very difficult to do if you possess the right materials and skills. That being said, there are many precautions to take if you decide to create your PCB tinning solution and apply PCB tinning to your own homemade printed circuit boards. Since DIY PCB tinning does entail using household items, it also can cost some money. This chapter will cover both of these.

The stereotype of fluids being placed into tubes and blowing up in chemistry classes is not entirely wrong. Do not forget that printed circuit boards revolve around electric charges and generating power to and from a source. Moreover, although PCB tinning is done when a printed circuit board is not necessarily active, dangers are still involved.

As you can see from the above picture, not only does the creation of almost anything related to a printed circuit board involve a lot of small materials, but these materials are very fragile and under much pressure.

Take tin plating chemicals such as thiourea, for example. While it will not necessarily combust when mixed, it can still contaminate food and fluids around it, and it can make these things toxic when other people who are not aware of it come in contact with it. It is made explicitly clear in this instructional guide for anybody interested in electroless tin plating.

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