Alkaline Etching Additive(Liquid)
LW-01 Alkaline Etching Additive is a light yellow liquid with the solid content over 43%. It is used for avoiding the scale formation and the aluminium dissolution can be over 120g/L. The additive can improve the etching quality, decrease the aluminium loss and the consumption of alkali. It is eco-friendly.
Preamble
Liquid alkaline etchants are used to remove oxides, rust, and contaminants from metal surfaces. Common alkaline etchants include sodium hydroxide solutions, which are effective for removing rust and grease; potassium hydroxide solutions, similar to sodium hydroxide, used for cleaning; phosphate solutions, which are used for surface treatment and protection of metals; ammonia solutions, useful for removing specific types of dirt; and sodium carbonate solutions, which are employed to remove light contaminants and oils.
When using liquid alkaline etchants, it’s important to follow safety measures, such as wearing personal protective equipment, and to avoid corrosion damage to metals. Additionally, waste solutions should be disposed of according to environmental regulations.
1. Bath Make-up:
Name | Quantity | Unit |
LW-01 | 20 | g/L |
Sodium Hydroxide (NaOH) | 40 | g/L |
Water | Balance | |
2. Operating Conditions:
Name | Quantity | Unit |
Temperature | 40-65 | ℃ |
Time | 1-25 | min |
Free alkali (Sodium Hydroxide) | 40-70 | g/L |
3. Solution Maintenance:
1) Analyze the concentration of free alkali and aluminum ion everyday. It is recommended that the concentration of free alkali in a new make-up bath should be 40g/L. And the alkali concentration and the solution temperature are slowly increased according to the increasing of aluminum ion. LW-01 and alkali should be added with the scale of 1/6-1/3.
2) Normally, the color of the solution is dark-gray. It will be light-grey if lacking of alkali or LW-01, then need to replenish in time.
3) When the etching solution is not being used, keep the temperature around 40℃, or increase the concentration of sodium hydroxide (NaOH) and LW-01 for avoiding precipitations.
4. Packaging and Storage:
Package: Plastic barrel (25kg/barrel,1000kg/barrel)
Storage: Suggested to store in a cool, dry and well ventilated place; away from fire and heat source.
