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2. Chemical coloring of metals - Wikipedia

   en.wikipedia.org/wiki/Chemical_coloring_of_metals

   Various colors on stainless steel 18 Cr / 8 Ni 7.5 g of sodium dichromate , 1000 mL of sulfuric acid (1.24 g/cm 3 ), lead cathodes, object as an anode, 70-90 °C temp, 0,06 A/dm 2 , voltage 1.3 V – colors depend on the duration of the procedure (5-50 min.), brown, blue, reddish brown, yellow, green.

3. Black oxide - Wikipedia

   en.wikipedia.org/wiki/Black_oxide

   Black oxide or blackening is a conversion coating for ferrous materials, stainless steel, copper and copper based alloys, zinc, powdered metals, and silver solder. [1] It is used to add mild corrosion resistance, for appearance, and to minimize light reflection. [ 2 ]

4. Bluing (steel) - Wikipedia

   en.wikipedia.org/wiki/Bluing_(steel)

   Similarly, stainless steel parts may be immersed in a mixture of nitrates and chromates, similarly heated. Either of these two methods is called 'hot bluing'. Hot bluing is the current standard [ 7 ] in gun bluing, as both it and rust bluing provide the most permanent degree of rust-resistance and cosmetic protection of exposed gun metal, and ...

5. What You Need to Know About the Discoloration of Stainless ...

   www.aol.com/know-discoloration-stainless-steel...

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6. Stainless steel - Wikipedia

   en.wikipedia.org/wiki/Stainless_steel

   Stainless steel, also known as inox, corrosion-resistant steel (CRES), and rustless steel, is an alloy of iron that is resistant to rusting and corrosion. It contains iron with chromium and other elements such as molybdenum , carbon , nickel and nitrogen depending on its specific use and cost.

7. Phosphate conversion coating - Wikipedia

   en.wikipedia.org/wiki/Phosphate_conversion_coating

   Phosphate conversion coating is a chemical treatment applied to steel parts that creates a thin adhering layer of iron, zinc, or manganese phosphates to improve corrosion resistance or lubrication or as a foundation for subsequent coatings or painting. [1] [2] [3] It is one of the most common types of conversion coating.

8. Biosand filter - Wikipedia

   en.wikipedia.org/wiki/BioSand_Filter

   A stainless steel biosand filter developed by engineers at S M Sehgal Foundation, an NGO based in Gurugram (formerly Gurgaon), India, has been found to perform better than its concrete counterparts and with a wider opportunity for application and adoption in different geographical conditions. The high cost of plastic prevents its use in rural ...

9. 7 Tricks To Prevent Food Spoilage, According To Experts - AOL

   www.aol.com/7-tricks-prevent-food-spoilage...

   Here are seven tips to prevent food spoilage, according to experts. Meet the Experts. Deb Paquette, chef/owner at etch and etc. in Nashville, Tennessee.