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2. 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.

3. Rustproofing - Wikipedia

   en.wikipedia.org/wiki/Rustproofing

   Weathering steel, often referred to by the genericised trademark COR-TEN steel and sometimes written without the hyphen as corten steel, is a group of steel alloys which were developed to eliminate the need for painting by forming a stable external layer of rust. U.S. Steel (USS) holds the registered trademark on the name COR-TEN. [7]

4. Galvanization - Wikipedia

   en.wikipedia.org/wiki/Galvanization

   Rusted corrugated steel roof Galvanized steel can last for many decades if other supplementary measures are maintained, such as paint coatings and additional sacrificial anodes . Corrosion in non-salty environments is caused mainly by levels of sulfur dioxide in the air.

5. Hot-dip galvanization - Wikipedia

   en.wikipedia.org/wiki/Hot-dip_galvanization

   Galvanised hand rail Crystalline surface of a hot-dip galvanized handrail, known as "spangle" Protective effect: completely rusted letter box mounted to a hot-dip galvanized wall Steel strip coming out of the zinc pot of a continuous vertical hot-dip galvanizing line. Hot-dip galvanization is a form of galvanization.

6. Bluing (steel) - Wikipedia

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

   This method was adopted by larger firearm companies for large scale, more economical bluing. It does provide good rust resistance, which is improved with oil. "Rust bluing" and "fume bluing" provide the best rust and corrosion resistance as the process continually converts any metal that is capable of rusting into magnetite (Fe 3 O 4). Treating ...

7. Conversion coating - Wikipedia

   en.wikipedia.org/wiki/Conversion_coating

   The most common conversion coating processes for metal parts with industrial use include Chromate (aluminum, steel) Phosphate (steel) Bluing (steel) Black oxide (steel) Anodizing (aluminum) Stannate (magnesium) [5] Molybdate (zinc, zinc-nickel) [6] [7] Zirconate (steel, aluminum, magnesium, galvanized steel). [1] [8] [9] Titanate (steel ...