inorganic chemistry - Why do vinegar and other acids remove rust ...
网页2017年4月5日 · The acid can dissolve rust (e.g. FeOOH F e O O H). The chemical reaction is: 3CHX3COOH +FeOOH Fe(CHX3COO)X3 +2HX2O 3 C H X 3 C O O H + F e O O H F e (C H X 3 C O O) X 3 + 2 H X 2 O. EDIT: (Fe(OAc)X3 F e (O A c) X 3 is NOT soluble in water) The acid forms a water-insoluble salt with the iron oxide, which then probably just …
What current and voltage are best for electrolysis rust removal?
网页2015年9月17日 · Pool Water Electrolysis for Rust Removal. 6. How to control current and voltage in electrolysis. 0.
Rust removal ended with black oxide on the metal?
网页2017年12月3日 · 3. I have tried to remove common red iron rust from a small piece of metal that looks like steel. I submerged it into hot water with a bit of citric acid, and let it sit overnight. In the morning I have no rust, but the thing is now covered in dark-black oxide.
corrosion - Do I need to 'neutralise' iron/steel/metal with a base ...
网页2022年3月10日 · Rust is a spot phenomena. It does not proceed on the whole surface of iron and steel plates. Rust starts at and around surface microcrystals of "impurities". When started, it goes on around the same microcrystal, digging deeper and deeper at the same point. The metallic surfaces more than about $1$ millimeter away form the spot are …
redox - Acetic (vinegar) and citric acid as the rust remover ...
网页2017年2月21日 · Long, long time ago I was employed to formulate rust removers for iron. We needed to be concerned with toxicity, corrosivity, cost, waste disposal, effectiveness, speed, damage to the (uncorroded) metal, and flash rusting (rapid rusting once cleaner is rinsed off). Rust isn't just one chemical compound.
Chemically removing rust without leaving any unwanted residues
网页The rust is the brownish-red type, which according to Wikipedia consists of $\ce {Fe2O3·nH2O}$ and $\ce{FeO(OH)·Fe(OH)3}$. Most rust-removal "recipes" I found involve all sorts of acids, but I can't tell what the reaction(s) would be with $\ce {Fe2O3·nH2O}$ so I can't tell if there would be any residues left behind that I could not remove.
How does WD-40 remove rust? - Chemistry Stack Exchange
网页2017年7月7日 · 17. One of the often-touted uses of WD-40 is that it "dissolves rust". The official website states that WD-40 "breaks down the bonds between metal and rust". I can't understand how this would work, since there seem to be no rust-dissolving ingredients in WD-40 and it seems the product is more basic than acidic.
redox - Removing Rust with Coke - Chemistry Stack Exchange
网页2016年9月27日 · Phosphate ions adhere to rust, making rust particles negative and promoting dispersion in the liquid and disadhesion from the iron metal. Some elbow grease is generally needed. Overall, the extra corrosion from Coke or other phosphoric acid is minimal, and the dispersive effect is helpful, and the iron is better protected after the …
Painting metal, does it matter if all rust is removed before?
网页2014年11月10日 · "If the surface still has extensive rust after all loose rust has been removed, start with Krylon® Rust Protector™ Rust Converting Primer or Krylon® Rust Tough® Rust Fix. This primer chemically changes rust into a waterproof, paintable surface. Spray directly over the remaining rust to protect against further corrosion."
Can hydrogen peroxide dissolve rust? - Chemistry Stack Exchange
网页2021年10月5日 · 4. WD-40's "help page" on "How To Loosen Rusty Bolts, Screws And Nuts" states: Hydrogen peroxide can dissolve rust. Applying hydrogen peroxide to the fasteners and letting it sit is also an effective method to remove rust and loosen nuts and bolts. I'm no chemist, but most of what I've found in the last couple of hours tells me that hydrogen ...
跳至内容