Rust removalwith various metals and alloys
|Rust removal from zinc||Rust removal from iron||Rust removal from steel||Rust removal from cast iron||Rust removal from stainless steel|
|Rust removal from copper and copper alloys||Corrosion of metals
|Rust removal from aluminum items||Rust removal from magnesium alloys||Rust removal form lead|
|Rust removal with nickel items|
Rust removalMethods of Rust removal from iron
1) water - 1000 ml concentrated phosphoric acid (H3PO4)- 150g, butyl alcohol 4 g
2) water - 1000 ml, citric acid 15 g, concentrated phosphoric acid (H3PO4) - 280 g
3) water - 1000 ml concentrated phosphoric acid (H3PO4) - 280g, butyl alcohol 30 g, ethyl alcohol 120 grams hydroquinone -1 g (used as a reductant metal in photographic technique).
These solutions are used to remove rust at a temperature of 200 C. The Solution was applied on an iron surface, wait some time and then clean it off with a brush or cloth. Restored iron surface was washed with water and dry.
Rust removal from steel
Treatment of the steel surface by some of the following recipes removes rust and attaches to steel objects resistance to corrosion and in some cases (the first of the recipes) and Shine.
1) Simple solutions can be diluted acids:20% sulfuric acid (50 0 C), 25% solution of hydrochloric acid (at room temperature), 15% solution of phosphoric acid up to 70 0C
4) concentrated phosphoric acid (H3PO4) - 285 g, tartaric acid 12 g, zinc phosphate (Zn3(PO4)2) - 8g, the chromium trioxide - 3 g, isopropyl alcohol 6 g.
2) 15% phosphoric acid; process for 15 to 20 minutes at a temperature 50 0C. This method is used for items with a thick oxidized layer.
3) 2% phosphoric acid; the surface is treated for 30 minutes at a temperature 80 0C. This method is used for items with a thin oxidized layer.
4) 10% solution of chloride of tin - 100 ml and 0.25% solution of tartaric acid - 100 ml. Solution was mixed before use, process for about 30 minutes at a solution temperature 40 0C. This method is used for the most valuable objects with strong oxidation.
Although it is called stainless steel (stainless steel) - with time, it may also be covered by a layer of oxide. Here the following compositions to Rust removal:
1) concentrated sulfuric acid - 300 g and water - 1000 ml. Processing is conducted at room temperature.
1) water - 1 liter, concentrated sulfuric acid and 180 ml, concentrated nitric acid - 130 ml (for galvanized iron, which degreased and cleaned previously). Treatment is carried out for one minute at room temperature of a solution, then the surface washed with water and dried. Using 3% sulfuric acid for very thin iron.
1) water -1 l, sodium hydroxide - 100 g, sodium chloride - 20 g. Treatment is carried out at a temperature of 50...60 0C of a solution within a few seconds, then washed with water. Aluminum darken, so to light the surface the object should be handled with 50% nitric acid, then washing with water and drying.
1) water -1 l, concentrated sulfuric acid - 17 g, chromic acid -150 g. Temperature of solution should be 75 0C, the treatment is conducted for 30 min, then washed thoroughly with water. The solution cleans and adds resistance to sea water.
- to do this, take 1 liter of water, concentrated hydrochloric acid - 100 g. Processing need to keep at room temperature to remove the oxide layer, then rinse with water.
For solution required: water - 100 ml, concentrated sulfuric acid - 280 g, concentrated nitric acid 300 g and sodium chloride -3 g. Treatment is carried out at room temperature for 10...20 0C. Washed with water, then nickel subject treated with 1% solution of ammonia for the neutralization of the acids, then need to rinse with water again.
|Pure aluminum, pure tin|