At present, trivalent chromium electroplating process has became one of the mostimportant techniques to taking place of the seriously pollutional hexvalent chromiumelectroplating process.
In order to strengthen its antifriction property, the material nature of the boards chooses a special formula of high molybdenum, high chromium and nickelic.
Some common troubles such as poor throwing power,burnt deposit on rim,dull gray coating,piebaldism,blue film,hazy deposit,spongy surface and roughness in decorative chromium plating were summarized.
Pyridine can react with halogens,nitronium fluoroborate, sulfur trioxide, boranes and chromium trioxide to form some useful organic reagents which are introduced briefly in the paper.
Some sneaker tops are made from natural sources like leather, but tanning this material relies on chromium; a carcinogenic chemical that can damage freshwater ecosystems.
Firstly, too much turbidity, trace organic compounds, or high-density heavy metals like arsenic, chromium, or lead, mean that the water is unsuitable for consumption.
Columbia University researchers using this machine found the vapor has toxic metals like chromium, nickel, zinc and lead and as we know, there's no safe level of lead.
This may actually be stainless steel but chromium looks very similar and it was very popular for plating bumpers, all sorts of materials in the 1930s up to the 1950s.
Well that doesn't hold up for all of them because you even have special cases like copper and chromium that only go four S one and then start filling three D depending on the circumstances.
I thanked her and went and sat in a chromium and leather chair that was a lot more comfortable than it looked. Time passed and silence descended on the scene. Nobody came in or went out.
It was there all right, the chromium and glossy paint shining a little even in the dark, and the red reflector glass of the tail-lights shining back at the pencil flash. It was there, silent, lightless, all the doors shut.