The easiest way of overcoming it is to remove the lead with an anodic etch in fluoboric acid. The way that lead makes brass machinable is by the lead acting as a dry lubricant between the cutting tool and the workpiece, but it results in a thin layer of lead over the brass that will cause an adhesion problem with any deposited metal. ![]() Free machining brass is a difficult substrate to electroplate because the lead smears over the surface this can often be seen as a light grey coloration to the metal surface. Suggestions/comments will be appreciated.Ĭaptive Plating Shop - Indianapolis, Indiana, USAĪ. This antiquing process goes right on to the brass substrate. Also, the antiquing process might be a problem because the color may not be identical as not all brass alloys will be changed to 268. We have had plating problems with 'leaded brass' in the past, but I am not sure what the alloy was.įor our automatic antiquing process, we have been told that if we were processing a leaded brass we would need a different type of acid salt that would take a 'bite' out of the Pb film. Will a brass alloy with more Pb require a different type of acid salt? We currently use a sulfuric/fluoride type acid salts. The Pb content in 268 is double that of 260. Our company would like to change from 260 to 268 Yellow Brass. We plate several brass alloys with semi-bright nickel/chrome and bright nickel/chrome.Ĭurrently we use 260 Cartridge Brass for many of our plating processes. Please see our FAQ "Silver Plating at Home". Unless the bracelet has sentimental value, you'd probably be better off just buying a new one.īut one possibility if you rarely wear the bracelet, so the thickness and wear resistance isn't important, is a do-it-yourself immersion plating process. So re-plating is expensive and you likely won't find anyone to plate it for $20 or less. Plating is labor intensive and the plater doing the re-plating will be spending his time on one bracelet rather than processing a rack of 100 or more bracelets like the original manufacturer did. Despite the slightly higher metal price, silver plating would probably be more economical than chrome. Chrome plating is a difficult process to do on a shape like a bracelet. Please call +1 3 or contact us for rates to other locations.A. Ground shipping only to the Continental USA. ![]() Not available to residents of California unless an appropriate permit has been obtained.Ĭontains Hazardous Goods. It is unnecessary to replace these anodes. The Chrome is removed from the Chromic Acid solution, and the anodes are not sacrified. You should never need to replace this material. The Chrome Crystals supplied with the kit contain sufficient chrome to plate over 1000 square feet of chrome plate per gallon of made up solution. Fume Control Balls and chemical mist suppressant are supplied with the kit to reduce this problem. This mist could be compared to dropping several 'Alka Seltzers' into water, and needs to be controlled by either making a small fume hood, (a cooking stove hood is ideal) or wearing a respirator fitted with 'Acid Gas' cartridges. Acid mist is produced during the chrome plating process from the vigorous action of the higher current used. Full instructions are in the Complete Plating Manual. The higher amperage required can also be controlled by the inexpensive construction of a 'salt water rheostat', a device made from a plastic tank, some salty water and 2 metal plates. You can chrome plate with a 6 or 12 volt battery, or charger, but if larger parts are involved, you may need to use 2 batteries. This makes the larger operations more impractical for the smaller workshop. Hard Chrome plating requires large amounts of DC current (approx 2 amps per square inch). ![]() The anodes are shaped, or "conformed" to the part being plated, to assure an even plate. Hard Chrome Plating is often used in industry to build up areas that are subject to wear, pistons, firearms and golf club heads. If you are interested in decorative chroming, you'll likely want to purchase our Triple Chrome Plating Kit. This chrome plating kit is NOT capable of decorative chrome plating. Decorative chrome plate can be considered a 'clear coat' over the nickel 'paint job'. The chrome merely gives the nickel a 'blue' look, and stops it tarnishing. Chrome offers NO corrosion resistance, as it is porous, so the nickel does all the protection. 1/100th the thickness of a human hair, which is applied over a NICKEL plate. Most chrome plate is considered 'decorative'.The procedure is discussed extensively in The Complete Plating Manual, paying particular attention to the hard tipping of cutting tools. The hard chrome plating process can take several hours to build up. Usually used to build up shafts or areas on steel that are subject to severe wear. ![]() Chrome plating can be used for two purposes:
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |