Menu
For all metalworking fluid, it’s unavoidable to be contamined by microbial growth, Syner Chem supply one set of biocides for water-based metal working fluid, oil-based metal working fluid, coolant and cutting fluid,Rust preventive oils ect. With our latest technical team with more than 10 years, and they are familiar with the products from the famous company and know the concern of different metalworking fluid clients. We are not only supply products, but also supply technical support for our clients based on our mass clients difficulties.
Before, our products mainly serve Chinese clients and our aim is to use our product to replace the higher cost products from Foreign markets, now we get more and more foreign clients’ demand and supply solution to them to replace the products they are using with higher price.
If you also need us, pls feel free to contact us.
Emulsions, Semi-synthetic fluids, Fully synthetic fluids, Microemulsions, Cutting fluids and coolants
Straight mineral oils, Compound oils, Animal and vegetable oils, Synthetic oils ,cutting fluid and coolants
Applied to prevent rust and corrosion of metal components during storage, transportation, or periods of non-operation.
Prevent microbial growth: Metalworking fluids provide an ideal environment for the growth of bacteria, fungi, and yeast. Microorganisms can multiply rapidly in the presence of water, nutrients, and suitable temperatures. The presence of biocides helps to inhibit their growth and reproduction.
Maintain fluid performance: Microbial contamination can degrade the properties of the metalworking fluid. It can cause changes in pH, viscosity, emulsion stability, and corrosion inhibition capabilities. Biocides help preserve the integrity and functionality of the fluid.
Protect equipment and workpiece: Microbes can cause corrosion and fouling of machine tools and metal workpieces. This can lead to reduced tool life, increased maintenance costs, and compromised product quality. Biocides prevent such damage and ensure the longevity of equipment and the quality of the final product.
Reduce health risks: Some microorganisms can produce harmful substances or allergens that threaten workers’ health. Biocides help control the microbial population, minimizing potential health hazards in the workplace.
Extend fluid lifespan: By preventing microbial growth, biocides allow the metalworking fluid to be used longer before it needs to be replaced or treated, reducing overall operational costs.
Widely used biocides for metalworking fluid including , Morpholines, Oxazolines, Isothiazolinones: Organic halogens: Phenols: Glutaraldehyde
Such as BK, chemically known as 1,3,5-tris(2-hydroxyethyl)-hexahydro-triazine, belongs to water-based, low-toxicity biocides. It is suitable for high pH and high-temperature environments, has broad-spectrum sterilization, and has a moderate price. It can be used in concentrated liquids or on-site treatment. The dosage in concentrated liquids is 2%-5%, and the on-site sterilization dosage is 0.1%-0.25%.
Such as MBM, chemically known as N,N’-methylenebismorpholine, is a broad-spectrum and highly efficient fungicide with a long-lasting effect, low odor, pH application range of 4-12, low skin irritation, good compatibility in emulsified oil. The general recommended dosage is 0.1%-0.3% of the total weight of the product and can be used in combination with biocides.
Such as MBO is a broad-spectrum fungicide, especially effective against sulfate-reducing bacteria, with a long-lasting effect, low odor, pH application range of 7-11, no sensitization to the skin, and good safety. It also has the function of amine, anti-corrosion, and has pH buffering capacity under alkaline conditions to maintain the viscosity of the emulsion. The general working fluid concentration is 0.04%-0.2% and can be used in combination with biocides.
IPBC: Chemically known as 3-iodo-2-propynyl-butyl carbamate, it is an efficient and low-toxicity fungicide. The applicable pH range is 4-10, has a long-lasting effect, high cost performance, and has a good preventive and killing effect on fungi in the metalworking fluid system (aqueous and oily). The dosage in concentrated liquids is 0.1%-0.3%. IPBC has poor effect on bacteria and can be used in combination with antibacterial agents.
DBNPA: Chemically known as 2,2-dibromo-3-nitrilopropionamide, it is a high-speed, efficient, and low-toxicity fungicide, effectively targeting bacteria, molds, and yeasts. The pH application range is 3-9.5. The temperature should not be higher than 50°C. It hydrolyzes rapidly in an alkaline environment. Its degradation final products are CO2 and H2O. It is generally used in working fluids. The recommended dosage is 0.05%-0.1%. This structure has good compatibility with isothiazole biocides.
Broponol: Chemically known as 2-bromo-2-nitro-1,3-propanediol, it is a biocides, especially for Pseudomonas. The pH application range is 3-9. It belongs to formaldehyde releasers. It is generally used in working fluids. The recommended dosage is 350-1000 ppm. This structure has good compatibility with isothiazole biocides.
CMIT/MIT: Effectively kills bacteria, molds, and yeasts. The general addition amount is 100-200 ppm.
BIT20: Chemically known as 1,2-benzisothiazolin-3-one, it is effective against bacteria, yeasts, and molds, has a long-lasting effect, low odor, pH application range of 2-12, low toxicity, good safety, and especially has excellent thermal stability. BIT20 has good compatibility with other biocides and is often used in high-temperature and strongly alkaline environments where other preservatives do not work. It can be used in concentrated liquids or working fluids. The recommended dosage (relative to the diluted liquid) is 0.1%-0.2%, and it is advisable to use it in combination with biocides in concentrated liquids.
OIT: Chemically known as (2-n-octyl-4-isothiazolin-3-one), it is a broad-spectrum antifungal agent and has a certain effect of killing bacteria and algae. OIT has relatively high water solubility compared to other antifungal agents, and also has wide compatibility and good compatibility with various metalworking fluid formulations. However, attention should be paid to its instability under high pH (>9.5). It is generally used in working fluids. The recommended dosage (relative to the diluted liquid) is 0.02%-0.2% and can be used in combination with antibacterial agents.
MIT: Chemically known as 2-methyl-4-isothiazolin-3-one, it inhibits bacteria, molds, and yeasts, has a long-lasting effect, low odor, contains no solvents, zero VOC, pH application range of 4-9.5, low toxicity, good safety, and especially has excellent thermal stability. It can be used in concentrated liquids or working fluids. The recommended dosage is 100-300 ppm (diluted liquid) and it is advisable to use it in combination with biocides.
BBIT: Chemically known as -butyl-1,2-benzisothiazolin-3-one, it is effective against bacteria, molds, yeasts, and some algae, has a long-lasting effect, low odor, pH application range of 4-10, and has excellent thermal and chemical stability, as well as wide compatibility. It can be used in concentrated liquids or working fluids. The general recommended dosage is 100-400 ppm (diluted liquid).
OPP: Chemically known as 2-phenylphenol, it is a broad-spectrum fungicide and also has certain bactericidal properties. It is easy to biodegrade and has a quick effect, especially suitable for highly alkaline and high-temperature systems. The general usage in working fluids is 0.1%-0.25%, and in concentrated liquids is 0.12%-2.4%. Due to the certain irritation of this structure to the eyes, pay attention to eye protection when using it.
PCMX, PCMC, DCMX series: Safe and efficient anti-mildew and antibacterial agents, non-irritating, low toxicity, good chemical stability, high temperature resistance, and high pH resistance. They usually do not deactivate under normal storage conditions, have low solubility in water, are easily soluble in organic solvents such as alcohols, ethers, ketones, and alkaline aqueous solutions, and are suitable for concentrated liquid anti-corrosion and anti-mildew systems. The general recommended dosage is 1%-3%.
Broad-spectrum and rapid sterilization, especially for SRBs. The structure is low-toxic and easily biodegradable. The applicable pH range is 7-10 and can be used in working fluids. The general recommended usage concentration is 200-2000 ppm.
(Chloromethylisothiazolinone/Methylisothiazolinone): Commonly used in water-based metalworking fluids.
(Benzisothiazolinone): Can be utilized in oil-based metalworking fluids and rust preventive oils.
(2-n-Octyl-4-isothiazolin-3-one): Can be applied in both water-based and oil-based metalworking fluids.
(Methylene Bisthiocyanate): Mainly applicable to water-based metalworking fluids.
(2-Mercaptobenzothiazole): Often used in oil-based metalworking fluids and rust preventive oils.
(Triazine) Suitable for water-based metalworking fluids.
(Iodopropynyl Butylcarbamate): Can be used in both water-based and oil-based metalworking fluids, as well as rust preventive oils.
(2-Bromo-2-nitropropane-1,3-diol): Commonly found in water-based metalworking fluids.
(2,2-Dibromo-3-nitrilopropionamide): Mainly used in water-based metalworking fluids.
Compatibility with metalworking fluids: Ensure that the biocides does not have adverse reactions with other components in the processing fluid, resulting in a decline in the performance of the processing fluid.
Spectrum and efficacy of sterilization: According to actual needs, select a biocides that has a good inhibitory and killing effect on common microorganisms.
Applicable pH range: It should match the pH range of the metalworking fluid.
Safety: Including the health impact on operators and the friendliness to the environment.
Stability: Be able to maintain the stability of the active ingredients during storage and use.
Regulatory compliance: Select products that comply with relevant laws and regulations.
The bactericidal effect of biocides for metalworking fluids can be detected through the following several methods:
Plate counting method: Steps: Take samples from the metalworking fluid that has used the biocides, perform gradient dilution, and then spread the dilution on a specific culture medium plate. After culturing for a certain period of time at an appropriate temperature, count the number of colonies growing on the plate.
Advantages: It is a commonly used and intuitive method that can directly reflect the number of microorganisms.
Extinction dilution method: Steps: Serial dilutions of the sample to be tested are performed with sterile water, and then inoculated into the test medium. Observe the lowest dilution at which bacteria grow to determine the number of bacteria in the sample.
Advantages: It can more accurately determine the minimum existing concentration of microorganisms.
ATP bioluminescence method:
Steps: ATP in microorganisms reacts with luciferin-luciferase to produce light, and the amount of microorganisms is determined by detecting the luminous intensity.
Advantages: The detection speed is fast and the operation is relatively simple.
Microscopic observation method: Steps: Directly observe the morphology and number of microorganisms in the metalworking fluid sample under a microscope.
Advantages: The morphological changes and reduction in the number of microorganisms can be visually observed.
During the detection process, a control group (metalworking fluid sample without the addition of the biocides) needs to be set up to comparatively evaluate the effect of the biocides. At the same time, in order to ensure the accuracy and reliability of the detection results, the detection should be carried out under sterile conditions and the experiment should be repeated multiple times.
The application methods and dosage of biocides for metalworking fluids may vary depending on factors such as the type of biocides/ bactericide, the type of metalworking fluid, and the usage conditions. The following are some common application methods and general dosage references:
Application methods:
Direct addition: Add the bactericide in the calculated amount directly to the circulation system or reservoir of the metalworking fluid.
Pre-mixing addition: First, uniformly mix the bactericide with a small amount of metalworking fluid in a separate container, and then pour it into the entire system.
Dosage:
Isothiazolinone-based biocides: In aqueous metalworking fluids, the general dosage is 0.1% – 0.3% (mass fraction).
Triazine-based bactericides: The usual addition amount is between 0.1% – 0.5% (mass fraction).
Morpholine-based bactericides: The addition amount in the metalworking fluid is approximately 0.05% – 0.2% (mass fraction).
It should be noted that these are only approximate reference dosages. In actual use, adjustments should be made based on the following situations:
The initial microbial contamination level of the metalworking fluid: A higher dosage may be required when the contamination is severe.
The usage frequency and environmental conditions of the processing fluid: Conditions such as high temperature and high humidity may require an increased dosage to maintain the bactericidal effect.
Compatibility with other additives: Certain additives may affect the effectiveness of the bactericide, thus requiring dosage adjustments.
Technical support and product testing;
Customization and development of lubrication or fuel additives;
The clients can speak directly to us under the protection of a confidentiality agreement;
Establishing technical cooperation based on Syner Chem’s R&D department and production department and its equipment;
Develop and manufacture innovative products that meet clients requirement for metal working fluids field.
Contact us right now to get more information, professional advice will be supplied within 12 hours.
You can get a price of this model or send us any question to get any information you would like to know, we will reply to you soonest.