DV Engineering has been supplying a tin plating service for many years and today we have a modern state of the art processing plant capable of providing a wide variety of electroplating services to meet the demands of our industrial customers.
The combination of barrel and vat processing facilities give us the ability to tin plate small components such as contacts and fasteners as well as larger pressings and castings.
We are able to control deposits from 2 to 25 microns as well as offer post plating treatments such as anti-tarnish dips and lubricants.
We tin plate onto most substrates including copper, phosphor bronze, brass, steel and zinc die-casts.
Ensuring high quality and competitive rates
In addition to ensuring the very highest quality, our tin plating departments also offer high capacity to meet the demands of industry in terms of speedy turnaround and both large and small batch sizes.
This flexible capacity together with a system of very accurate pricing ensures that our rates are consistently competitive.
The most common users of tin plating are divided between electronics, mechatronics, hardware, fasteners, food equipment and, most recently, solar. Here are a few examples from each industry: terminals and housings used in avionics, circuit breakers and interconnects used in construction of new homes and buildings, screws, nuts and bolts used on marine hardware in naval vessels, baking sheets and bowls used in food manufacturing and home cookware, and now solar panels.
Tin has many strengths making it a desirable choice due to its corrosion protection:
Fretting, which means surface to surface corrosion.
Environmental, which refers to sulphur bearing environments that cause tin to tarnish.
Decent contact resistance and excellent solder ability.
Potential for mirrors like aesthetic.
Flexibility to use matte tin plating to achieve a dull finish, or bright tin plating when a shinier finish is required
No known toxicity to life on Earth.
Tin plating is the lowest cost choice as compared to its rivals up the food chain such as silver plating and gold plating.
Tin's primary weaknesses are its low temperature operating window of less than 450° F or 232°C and inter metallic phenomena of which the latter is understood while the anterior is not. Both cause severe damage to electronics by bridging and creating shorts in the electronics which they are assembled. There is no understood and agreed upon cause of the tin whisker type while dendrites migrate due to electromagnetic reactions of tin ions.
Tin has several alloys that are employed regularly in the tin electroplating process. These include cobalt, lead, nickel and zinc. The uses of nickel and cobalt have similar results when alloyed with tin. They increase hardness, reduce friction and can be used for a chromium alternative for both functional and decorative purposes. Lead helps to improve solder ability. Zinc is alloyed specifically for increased corrosion protection and meant to be a cadmium replacement. By the addition of zinc up to thirty percent, you may also passivate the work with traditional chromates which add an added layer of atmospheric protection. Lastly, tin-silver is still being developed for multiple applications primarily for higher temperature solders as well as a hopeful alternative to pure silver plating for energy generation equipment.