LIQUID Technical Field

The invention relates to a formulation for producing an anti-corrosion liquid which can be used, without any dilution, for corrosion prevention of metals. Prior Art

Metals are prone to the oxidation and corrosion. Therefore, in general, two types of the protective coatings are used, i.e., permanent and temporary coatings. The permanent coatings include the oxide coatings, phosphate coatings, dyes, varnishes and other non-metallic materials which forms dry and hard films. The temporary corrosion inhibitor is, by definition, a material that can be easily removed from the metal surface after treatment. It is not designed to be permanent or difficult to remove as is in a dye system or plastic coating. There are several types of the temporary corrosion inhibitors. They are usually prepared by mixing the rust inhibitors, film-forming agents and other functional additives into a primary carrier (base oil, solvent, water, etc.). Vapor phase corrosion inhibitors (VpCIs) and contact inhibitors are considered as a type of the temporary corrosion inhibitors. The selection of the suitable corrosion inhibitors depends on the metal to be protected and the required protection period and the prevailing environmental conditions.

When the metal parts come into contact with water or oxygen, the rust forms on metal parts. The anti-corrosion oils are used to protect the metal surfaces and machine parts from the corrosion before, during and after processing, as well as during storage at the factory. Thus, the semi-finished products and finished parts are protected until further processing and assembly, or during transportation.

Wherever the metal parts and components are produced, there is a risk of corrosion and the anti-corrosion oils are used to prevent the corrosion. The anti-corrosion oils can generally be prepared in 3 types, i.e., mineral oil-based, solvent-based and water- emulsified oils.

The mineral oil-based anti-corrosion oils in the state of the art are used in the operations requiring the high protection period by forming an oily film layer on the metal surfaces. These products must be removed from the surface before the next operation, and in this context, they cause the additional costs as they need the cleaning baths.

The solvent-based anti-corrosion oils in another state of the art are particularly preferred in the applications in which the water repellency is desired. These solvent- based anti-corrosion oils are able to form a protective film by replacing the water on the surface in order to protect the parts that come out from the metalworking process and have the metalworking fluid on the surface. The use of the solvent-based protective oil has the important dangers in terms of the process and worker safety. The solvent- based products used in the state of the art pose a fire risk since they have a low flash point value, and on the other hand, they have an adverse effect on the health of the operator due to the skin irritation, respiratory tract irritation, and exposure through inhalation during use.

The main problem in the use of the water-emulsified anti-corrosion oils in another state of the art is that the protective oil baths need the constant measurement and maintenance.

It is known in the state of the art that calcium, barium, sodium sulfonates are widely used in the production of the anti-corrosion oil. In addition, the anti-rust salts such as nitrite, amine carboxylates, phosphates and some modified organic compounds such as alkanolamine also act as the corrosion inhibitors. However, the products which do not comprise the volatile organic compounds (VOC), nitrite, secondary amine and barium are preferred in terms of environment and safety.

There is a need to develop the new formulations which is not present in the state of the art and provide the production of a corrosion inhibitor that will eliminate said disadvantages. Summary of the Invention:

An object of the invention is to develop, instead of the solvent-based protective oils used in the pipe industry and many metalworking processes, an economical and environmentally friendly water-based, clear anti-corrosion product which has the same protective performance and eliminates the risks of the process and worker health caused by the use of solvents.

Another object of the invention is to develop a water-based product which eliminates the dependence on the petroleum products and is thus sustainable.

Detailed Description of the Invention:

The invention relates to a formulation for producing a unique anti-corrosion liquid with a very high water content, which can be used, without any dilution, to prevent corrosion of metals. Said liquid is a clear and stable solution. The water-based anti-corrosion fluid provided by the invention can be used for protecting an equipment and/or components in an indoor area and has been developed to eliminate the need for the oil-based or solvent-based preservatives.

The formulation of the invention which is developed for producing a water-based anti corrosion liquid comprises the distilled or demineralized water at the predetermined ratios, C8 - C22 organic monoacid and/or at least one diacid and/or at least one dimer acid and/or at least one trimer acid and/or at least one neutralizing agent and/or at least one mixture of nonionic and anionic surfactants and/or at least one glycol-based co-solvent and/or at least one calcium component and/or at least one biocide.

The product produced with said formulation is formulated by neutralization of C8 - C22 organic monoacid and/or at least one diacid and/or at least one dimer acid and/or at least one trimer acid with at least one alkaline hydroxide and/or at least one amine and/or at least one ethoxylated/propoxylated linear or branched fatty amine in distilled or demineralized water in predetermined ratios, and comprises at least one mixture of nonionic and anionic surfactants and/or at least one glycol-based co-solvent and/or at least one It is formulated to contain a calcium component and/or at least one biocide.. The distilled or demineralized water contained in the formulation is the main carrier for the components of the formulation and is used in the formulation content preferably at a rate of 50-95%.

In a preferred embodiment of the invention, C8 - C22 organic monoacid and/or diacid and/or dimer acid and/or trimer acid is used in a range of 1-20%. Said acids can be used separately in the formulation, as well as they can be added to the formulation between 1% and 20% in a mixture.

The neutralizing agent used to neutralize the above mentioned fatty acids is used between 1% and 15% in the formulation and comprises alkaline hydroxides such as sodium hydroxide and/or potassium hydroxide and/or magnesium hydroxide and/or monoethanolamine and/or triethanolamine and/or diglycolamine and/or isobutanol-2- amine and/or monoisopropylamine and/or diisopropylamine and/or triisopropylamine and/or the ethoxylated/propoxylated forms of C8-C22 fatty amines with the linear or branched chains and/or a mixture of said components (alkaline hydroxides, amines and fatty amines).

The compounds are wetted for the clarity and stability of the solution formed by the formulation, and the stabilization is provided. Preferably, a mixture of nonionic and anionic surfactants is used in the formulation for wetting the compounds in the formulation and providing the stabilization thereof. Said mixture of nonionic and anionic surfactants comprises one or more of the nonionic surfactants such as C8-C22 fatty alcohol ethoxylated or propoxylated with 2-20 EO units and/or C8-C22 fatty acid ethoxylated or propoxylated with 2-20 EO units and/or sorbitan ester ethoxylated or propoxylated with 2-20 EO units and/or C8-C22 fatty amide ethoxylated or propoxylated with 2-20 EO units and one or two of the anionic surfactants such as sodium dinonylnapthalene with a molecular weight of 400 to 600 g/mol and/or sodium dodecylbenzene sulfonate with a molecular weight of 420 to 560 g/mol. Said mixture of nonionic and anionic surfactants is in a range of 3-20% in the formulation.

As a glycol-based co-solvent, butylglycol and/or dibutylglycol and/or butyltriglycol and/or butylpolyglycol and/or ethylglycol and/or ethyldiglycol and/or ethyltriglycol and/or propyleneglycol monomethyl ether and/or dipropylene glycol dimethyl ether and/or a mixture thereof is used the formulation. Said glycol-based co-solvent improves the cold temperature stability of the formulation. The glycol-based co-solvent is preferably in a range of 1-15% in the formulation of the invention.

The calcium component comprises calcium dinonyl naphthalene sulfonate and/or calcium dodecyl benzene sulfonate and/or calcium salts of fatty acids of C8-C22 carbon chain length and/or one of the esters of hydrocarbons and oxidized waxes of C8 and C24 chain length and/or a mixture thereof in order to increase the corrosion resistance of the formulation. Said calcium component is in a range of 1-15% in the formulation of the invention. The biocide consists of formaldehyde releasing agents and protects the formulation of the invention against the bacterial and fungal attack. It is preferably in a range of 0.01 to 2% in the formulation. Said biocide is one of the components such as hexahydrotriazine and/or methylene-bis-morpholine and/or methylene-bis-oxazolidine and/or glutaraldehyde and/or ethyleneglycolformal and/or methylisothiazolinone and/or benzisothiazolinone and/or methylchloroisothiazolinone and/or sodium omadiene and/or zinc omadiene and/or 3-lodopropynylbutylcarbamate and/or a mixture thereof.

The corrosion protection performance of the liquid obtained with the formulation in real application was evaluated according to the humidity cabinet and salt spray test methods and was compared with the mineral-based and solvent-based anti-corrosion formulations in the state of the art, and the following results were found.

The appearance of the anti-corrosion liquid obtained with the formulation of the invention is clear and has a pH value between 8.0-10.0. The film thickness is between 0-5 pm and the film type is dry and clear. The Salt Spray Test resulted in 20 hours. The liquid produced with the formulation of the invention comprises the following technical features and/or advantages:

It does not contain the smell of solvent.

It is ready to use formulation.

It can be spread evenly and equally on the application surface.

It forms an effective film layer on the surface that will ensure performance.

It provides medium-term protection in indoor areas.

It does not cause the color change on the metal surface and prevents the color changes caused by the external factors.

It can be easily cleaned for the post-application processes.

Its maintenance costs are low since it does not require the monitoring of the concentration.

Since it is water-based, it does not endanger the health of the workers and meets the requirements for the environmental compliance.

It does not contain toxic and carcinogenic substances and VOCs.

The liquid produced in the laboratory is obtained by mixing the ingredients in the formulation of the invention in a predetermined order at a temperature in a range of 30- 40°C. After the distilled or demineralized water is brought to a temperature in a range of 30-40°C, firstly the neutralizing agents are dissolved, then the organic acids are added. After dissolving homogeneously, a mixture of nonionic and anionic surfactants is added, then the calcium additives are added. It becomes stable and clear with the glycol-based components and is stirred for 1 hour after the addition of the biocide. The resulting product is water-based and is used in its pure form and without mixing with water during use. It has a strong anti-corrosion performance like the solvent-based and mineral oil-based products.

The most important challenges in the formulation is to provide the transparency and stability of the product and to be able to formulate it with the calcium-based additives which are normally quite difficult to formulate in a water-based product. It is also one of the different aspects of this invention that a water-based product provides the similar protective performance with the oil-based and solvent-based products. Industrial applicability of the invention:

The invention relates to a formulation for producing an anti-corrosion liquid which can be used, without any dilution, to prevent corrosion of metals and is industrially applicable.

The invention is not limited to the above descriptions and a person skilled in the art can easily set out the different embodiments of the invention. These should be considered within the protection scope of the invention claimed by the claims.