How Can I Remove Grease from Metal?
Metal degreasing agents are chemical agents used on metal surfaces to remove oil, grease, and stains.
Metal degreaser
Metal degreasing agents are chemical agents used on metal surfaces to remove oil, grease, and stains.
- Chinese name
- Metal degreaser
- Types of
- Chemicals
- Used for
- Metal surface to remove oil, grease, stains
- Classification
- Solvent, semi-solvent and water-based
Degreasing is performed on metal parts before plating, painting, and metal processing.
1. Classification by traits:
(1) Solvent-based metal degreasers usually refer to metal degreasers that are insoluble in water and cannot be diluted with water; traditionally used kerosene, diesel, gasoline, trichloroethylene, trichloroethane, white electricity oil, etc. belong to Solvent-based degreaser.
(2) Water-based metal degreasers refer to metal degreasers that are soluble in water and can be diluted with water.
2. Classified by pH:
(1) Acid metal degreasing agent refers to the degreasing agent whose pH value is lower than 7,
(2) Neutral metal degreasing agent means a degreasing agent with a pH value of approximately 7;
(3) Alkali metal degreaser refers to a degreaser with a pH value greater than 7.
3. Classified by temperature:
(1) Metal degreasing agent at room temperature;
(2) Medium temperature metal degreasing agent;
1. Mechanical stirring for degreasing, water-based degreasing agents are generally used
2. Wipe degreasing. In most cases, use solvent-based degreasing agents, such as traditional white electricity oil, n-hexane, and white electricity oil substitutes.
3. Immersion degreasing, both solvent-based degreasers and water-based degreasers can be used;
4, spray degreasing, generally using water-based degreasing agents;
5. Ultrasonic degreasing, both solvent-based degreasers and water-based degreasers can be used, depending on the specific.
6. Electric degreasing, using water-based degreaser;
7, steam degreasing, etc., using solvent-based degreasing agents.
1. From the perspective of the type of oil stains to be removed, such as water-based metal degreasers for saponified oil stains, and solvent metal degreasers for non-saponified oil stains.
2. From the perspective of metal materials, such as whether the metal materials can resist acid and alkali, and water-based metal degreasers such as copper and iron are more likely to rust, oxidize and discolor. The factors that should be considered when selecting a metal degreasing agent are far more than the above two, and they cannot be listed one by one; the comprehensive effect should be confirmed by experiments.
Common metal cleaning agents are divided into solvent-based, semi-solvent-based and water-based. Among solvent-based metal cleaners, petroleum solvents are flammable, explosive, and wasteful of resources. Chlorofluorocarbons are the most commonly used solvent-based metal cleaners, but have been banned due to their damage to the atmospheric ozone layer. Therefore, solvent-based metal cleaners are gradually being replaced by semi-solvent-based and water-based metal cleaners. Compared with the semi-solvent type, the application advantages of water-based metal cleaners are more prominent. However, water-based metal cleaning agents also generally have the following deficiencies in industrial high-pressure cleaning: 1) there are many foams, which is not conducive to cleaning; 2) most of them contain nitrite, phosphate, silicate, etc. which are harmful to humans and the environment 3) After the oil stain is cleaned, the washing liquid is emulsified and dispersed, which is not easy to separate, causing waste of resources.
Recipe one
composition | Percentage content | Component action |
Sodium pyrophosphate | 2-4% | Complexing agent |
Coconut oil diethanolamine (6501) | 10-15% | Surfactant |
Diethanolamine | 4-6% | Organic base |
Diethylene glycol | 3-5% | Cosolvent |
Nonylphenol polyoxyethylene ether (TX-9) | 3-5% | Surfactant |
Polyether modified silicone | 0.1-0.5% | Defoamer |
water | 53-56% | / |
Recipe two
Coconut oil diethanolamide (6501) | 4-6% | Surfactant |
Fatty alcohol polyoxyethylene ether (AEO-9) | 3-5% | Surfactant |
Oleic acid | 2-3% | Surfactant |
Diethanolamine | 1 ~ 3% | |
Sodium dodecyl sulfate | 0-2% | Surfactant |
Sodium hydroxide | 1-2% | Inorganic base |
JFC | 1-2% | Penetrant |
Ethanol | 1 ~ 3% | |
water | margin | |
Recipe three
| ingredient | Feeding ratio | Ingredient description |
Triethanolamine oleate | 80 ~ 120 | Mixed solution 1 |
Coconut oil fatty acid diethanolamide (6502) | 80 ~ 120 | Mixed solution 1 |
Coconut oil fatty acid diethanolamide (6501) | 120 ~ 150 | Mixed solution 1 |
Sodium dodecyl benzene sulfonate | 30 ~ 80 | Mixed solution 1 |
Sodium dodecyl sulfate | ?? 60 ~ 100 | Mixed solution 1 |
Fatty alcohol polyoxyethylene ether | 120-180 | Mixed solution 1 |
80 water | 30 ~ 50 | Mixed solution 1 |
sodium benzoate | 10 ~ 30 | Mixed solution 2 |
Sodium pyrophosphate | 60 ~ 100 | Mixed solution 2 |
Urotropine | 10 ~ 20 | Mixed solution 2 |
Azelaic acid | 10 ~ 20 | Mixed solution 2 |
Myristic acid | 40 ~ 80 | Mixed solution 2 |
Ethanol | 130 ~ 180 | Mixed solution 2 |
Polyether modified silicone oil | 0 ~ 5 | Mixed solution 2 |
40 warm water | 30 ~ 80 | Mixed solution 2 |
