The degreaser is mainly configured by surfactants, so it is prone to a large amount of foam. Foam will increase the difficulty of cleaning and result in poor cleaning effect. Therefore, most degreasers require low-foaming or non-foaming formulations. How to achieve this? The foam can be controlled by adding a certain amount of degreaser and defoamer. This article analyzes the causes and hazards of degreaser foaming, and gives a plan for defoaming.
Causes of degreaser foaming
In the preparation process of industrial degreasers, in order to ensure good cleaning and degreasing effects of degreasers, surfactants are usually added. These ingredients are mainly:
1. Alkali builders (sodium hydroxide, soda ash, sodium silicate and sodium tripolyphosphate);
2. Surfactants (such as fatty alcohol polyoxyethylene ether (AEO) series, alkylphenol polyoxyethylene ether (TX, NP) series, etc.).
The degreasing agent mainly degreasing through the emulsification, penetration, wetting and other functions of the surfactant. Especially non-ionic surfactants have a good cleaning effect.
Non-ionic surfactants are relatively stable in acid and alkali media, have good compatibility with other types of surfactants, have good solubility in various solvents, have a strong ability to emulsify grease, and have good lubricating and dispersing properties. It does not adsorb on the metal surface, has good cleaning performance, and has less residual liquid. Nonylphenol polyoxyethylene ether nonionic surfactants have good wetting and emulsifying solubilization effects. The charged groups of anionic surfactants are easily adsorbed on the metal surface, and can also be adsorbed on the surface of the dirt, so that the groups with the same charge repel each other, resulting in reduced adhesion, which is beneficial to the removal of dirt.
Surfactant will change the tension of the system, so it is easy to produce foam and stable.
(Picture: degreaser foam)
The hazards of degreaser foam
1. Affect the follow-up process and slow down the production schedule.
2. Influencing the effect of cleaning and degreasing, residues and spots are prone to appear on the surface;
3. Foam increases the difficulty of cleaning, resulting in an increase in the amount of cleaning water and increasing cleaning costs;
Degreasing agent defoaming program
Too much foam in the degreasing agent can easily affect the cleaning effect and cause surface defects of the cleaning parts. Affect the compactness and bonding strength of the subsequent coating layer, and even lead to the failure of surface treatment.
Therefore, the degreaser formulation needs to control its foam to achieve low foam or no foam indicators. Adding a defoamer is a good way. If the correct defoamer formula is used, not only the dosage is small, the defoaming is obvious, and the effect is relatively good.
(Picture: Degreaser defoamer)
In view of the easy foaming characteristics of the degreasing agent formula, the degreasing agent defoaming agent developed and designed by the Nanhui defoaming agent manufacturer is a type of compound metal cleaning defoaming agent, which is configured by professional defoaming agent engineers and added to Used in degreaser, it can control the foam well, can realize the requirement of low or no foam of degreaser, save energy and reduce the cost of industrial cleaning.
Nanhui degreasing agent defoamer characteristics:
1. High defoaming active ingredients, small addition amount, obvious effect;
2. Provide free sample service, which can be obtained by contacting professional technology;
3. The product quality is stable and will not affect the quality and cleaning effect of the degreasing agent;
4. Stable defoaming, resistant to acid and alkali, high temperature, high pressure and other environments, and can continue to defoam under various conditions.
