|WikiProject Metalworking||(Rated C-class, High-importance)|
|WikiProject Chemistry||(Rated C-class, Mid-importance)|
|This article is written in American English (labor, realize, analyze), and some terms used in it may be different or absent from other varieties of English. According to the relevant style guide, this should not be changed without broad consensus.|
Hard chromium layers (over 10 microns)can be used in various applications and consequently subject to different types of quality requirements. Hard chromium layers of hard rods of hydraulic cylinders are tested on corrosion resistance in salt spray cabinets. Because these are destructive tests, only representative sample material can be tested. The salt spray solutions and the conditions in the cabinet are normed as well as the evaluation of the result after the test. The duration of the test is depending the agressivity of the test and the the general expectation the industry has developed for this type of materials.
Tone + possible copyvio
"Chrome plate shall be uniform in thickness on all surfaces ..."
(1) The prescriptive tone of this seems highly inappropriate for an encyclopedia article.
(2) It's "obviously" (I could be wrong) taken from somewhere, and needs a cite or to be removed as a copyvio.
- This is standard and can be found appended to every drawing and work order for chrome plate in any of the industries that calls for chrome plate. However as you say the tone is a bit prescriptive, I will reword it later to-day or find some generaly avalable source to reference it. --DV8 2XL 17:13, 12 February 2006 (UTC)
Application of Chrome
This article could be more useful if it had some description for laypersons regarding the way chrome is applied to surfaces & explination of that to which all the technical terms refer.
Chrome and under metals -
Chrome uses various under plating to base metals. Two come to mind.
1. The quoted Nickel - which gives Chrome a blue tint. "Cold Chrome or Cold Steel" 2. A warmer and more typical undercoat is Copper. The pink color warms up Chrome.
If getting something chromed - consider the placement and use - talk to the shop expert.
220.127.116.11 21:59, 6 February 2007 (UTC)
0. we strip the existing plating off the part you bring in. If you don't do parts 1 & 2 right you can peel the cracked chrome off with your fingernails. With Copper and Nickel, the best result is to use a strike bath for adhesion and different bath for strength. 1. standard procedure is alkaline copper (cyanide) on steel/iron because nickel doesn't plate well on iron. 2. Acid nickel over the copper. Needed for underlying hardness and corrosion resistance. 3. Acid chrome. Microscopically peppered with micron sized holes to base metal nickel which together with thin layer of Cr2O3 provides the corrosion resistance of chrome plating. Note that Cr(+6) has poor throwing properties, that is parts or protrusions closer to the anodes get more chrome and holes and details less. 4. Acid chrome plating is dependent on a "slime layer" containing Cr(+2) that is critical, formed in the initial start of current. 5. Cr(+3) plating isn't new or difficult and has much better throwing power and adhesion to base metals. Problem is matte finish. Great for corrosion resistant plate of small parts but more common zinc-nickel etc are shiny.
Shjacks45 06:19, 28 September 2007 (UTC)
"In 2007, a Restriction of Hazardous Substances Directive (RoHS) was issued banning several toxic substances for use in the automotive industry, including hexavalent chromium, which is used in chrome plating." From the article makes it seem that chrome has been banned from cars, "....Trivalent chromium baths are not yet common, due to restrictions concerning color, brittleness, and plating thickness."
So is Trivalent chromium now used in cars, doesn't seem like it since it's brittle.
The third and fourth paragraphs don't really seem like they belong here. Perhaps the third, with an appropriate reference might be an interesting anecdote, but even if it's there No doubt when the shops got on-line again these would be replaced. is not something one would expect to read in encyclopedia.
The fourth paragraph is just puffery. It doesn't say who the awards were from, nor does it give any reference to back it up. And even if it did, I don't think some industry awards for "the best chrome plating line" is worth including in an article about chrome plating.
I'm cutting the two paragraphs - if anybody wants to reference the third, make the language more encyclopedic & put it back, I'll be fine with it. The fourth would require a really convincing argument. CruiserBob (talk) 16:03, 30 June 2009 (UTC)
Hard Chrome - Citation needed
I saw this:
- Hard chrome, also known as industrial chrome or engineered chrome, is used to reduce friction....
OK, I found a referenceQQ-C-320B. This is from page 14.
- Class 2 plating, also known as “industrial chromium” or “hard chromium”, is used for wear resistance, abrasion resistance and such incidental corrosion protection of parts as the specified thickness of the plating may afford. Engineering chromium is usually applied directly to the basis metal and is finished by grinding to the specified dimensions.
It would seem to me that this paragraph would serve as a good reference to the "citation needed" gripe. What do you all think?
Not a very accurate article
Written by a Chemistry teacher rather than real world experience? Lead? Barium? "Sulfate"? Plating is from Sulfuric acid solution of Chromium Trioxide. The Sulfuric Acid is REQUIRED to get high current densities. The high current density is required to form and stabilize the divalent Chromium at the surface of the part that actually plates the Chromium on to the metal. Interruption of current will oxidize this layer and prevent chrome from plating on the part. The Lead in your car battery does not dissolve in sulfuric acid. Barium does not dissolve in Sulfuric acid. They will form a precipitate that will damage the part to be plated. Shjacks45 (talk) 16:44, 24 August 2011 (UTC)
Who, where, and when was chrome plating invented?
What is its history in industrial use?
A good history can found at
Could this be paraphrased and put in as history?
M Trigg-Hogarth (talk) 22:44, 3 March 2014 (UTC)