KR100973888B1 - The Composition of Lubricating Rust Inhibitor For a Prevention of Binding Defect - Google Patents

Abstract

The present invention relates to a lubricating antirust composition used in wire binding, and provides a lubricating antirust composition comprising 5 to 10% by weight of an organic aliphatic, 5 to 15% by weight of an organic amine, and a balance of a solvent.

Moreover, this invention provides the wire rod binding method characterized by suppressing binding flaw generation | occurrence | production in the wire rod surface by binding a wire rod after apply | coating the lubricating rust inhibitor composition comprised as mentioned above to a wire rod surface.

Lubricant, rust preventive, wire binding, binding defect

Description

The composition of Lubricating Rust Inhibitor For a Prevention of Binding Defect}

The present invention relates to a lubricating anticorrosive composition for preventing a binding defect, and more particularly, to a lubricating rust preventing solution for preventing surface binding defects caused by friction between product rings in the process of binding the wire product to the binding band. will be.

In general, after the wire rod is finished, the product is subjected to appearance inspection and finish trimming, and then compressed using a binding machine, and then packaged by binding with a binding band. The process is to maintain the shape of the product when the product is transferred to the warehouse or transported to the warehouse by solidifying the shape of the product, there is an advantage that the length of the wire rod product after compression is easy to transport the product, but usually Since both cross sections of the wire coil are pressed at a pressure of the binder of 10 to 25 tons, and then the bands are bound, the cutting and scratching as shown in FIG. 1 may occur due to the friction between the rings in the binding process. These defects cannot be identified in the bound state and are a type of flaw that can be seen only after unwinding the band and inspecting the inside, which has been a major cause of unknown defects in components after machining.

If the pressure of the binding device is lowered during binding, the occurrence of such scratches is reduced and the level is shallow, but the flaw cannot be completely removed. In addition, when the binding pressure is low, when the number of transfers increases, the coilings firmly bound to the binding band easily move, and as a result, the band becomes loose. As a result, when the product is placed on the ground, it falls down by not standing alone and falling sideways. When the product collapses, it is almost impossible to bind the two tonnes of weight again without the binding machine, resulting in a situation where the product must be scrapped. Therefore, it is not possible to lower the binder pressure blindly to prevent the binding defect. However, if the product is shipped as it is, customer complaints will occur.

Therefore, in order to solve this problem, a technique for preventing binding defects has been attempted by applying a lubricating solution which reduces the coefficient of friction between rings before pressing and passing the binder process.

Japanese Patent Application Laid-Open No. 2001-240986 (name of the invention: a corrosion inhibitor and a corrosion inhibitor and an anticorrosive coated steel wire coil coated with a rust preventive agent) is a coil using an anticorrosive agent composed essentially of one or two or more fatty acid esters, which are cyclic organic compounds. The method of preventing the rusting of the wire and improving the binding property of the wire coil is described.

However, the rust preventive agent described in the patent may cause problems in the post process performed to produce the wire rod as a product. For example, wire rods are typically subjected to pickling or mechanical scaling to remove surface scale prior to entering the product processing process. By the way, since the anti-corrosive agent of the patent contains a metal compound, when the wire rod coated with the anti-corrosive agent is added to the pickling bath, the metal component contained in the rust inhibitor is combined with the pickling component to generate debris to contaminate the pickling solution. . The result is a sharp drop in pickling capacity, incurring additional costs, such as the need to replenish the pickling solution or to change it completely.

Meanwhile, in addition to the lubricating solution of the patent, a lubricant such as general surfactant, soapy water or detergent is sprayed on the surface of the wire for lubrication binding.In this case, lubrication is possible, but staining occurs on the surface of the wire, causing the surface of the product to be stained. This happens and adversely affects the image of the product. Figure 2 is a photograph showing the surface unevenness of the wire rod coated with a conventional lubricant. Such stains on the surface contaminate the appearance of the wire rods, which at first glance might be considered defective.

In addition, when the wire is coated with a conventional lubricant is stored indoors for a long time, as shown in Figure 3, the rust occurs easily, rust occurs more easily than the product without applying a lubricant even when stored outdoors, long-term storage The rust will be so severe that it will erode the base structure of the product, making the product unusable.

In addition, general surfactants, soapy water or detergents, solutes remaining on the surface of the product during the pickling process contaminates the pickling bath to generate a float, thereby lowering the pickling ability.

In order to solve the above problems, the present invention reduces the coefficient of friction between rings at the time of binding, thereby preventing the occurrence of flaws, and does not adversely affect the pickling facility of the solute remaining on the surface of the product after binding. It is an object of the present invention to provide a lubricating rust preventive composition capable of performing a rust prevention role without leaving stains on the surface.

To this end, the present invention is 5 to 10% by weight of organic aliphatic. It provides a lubricating rust preventive composition for preventing binding defects comprising 5 to 15% by weight of the organic amine and the remainder of the solvent.

The lubricating rust inhibitor composition of the present invention may optionally further include 0 to 5 wt% of extreme pressure agent, and may further include other additives to assist in rust prevention and pickling treatment.

At this time, the organic aliphatic is a hydrocarbon having a carboxyl group and at least one selected from a chain lower fatty acid compound having 12 or less carbon atoms. The organic amine is a compound in which a hydrogen atom of ammonia is substituted with a hydrocarbon group. It is preferable that it is at least 1 sort (s) chosen from an aliphatic amine compound, and the said extreme pressure agent is at least 1 sort (s) chosen from a phosphate ester type compound.

On the other hand, the solvent is preferably pure water (pure water).

In addition, the present invention provides a wire binding method comprising applying the lubricating anticorrosive composition of the present invention to the wire rod surface and then binding the wire rod to suppress the occurrence of binding defects on the wire rod surface.

At this time, the coating is preferably made by the mist (MIST) injection method.

By using the lubricating rust preventive composition of the present invention, it is possible to effectively prevent the binding flaw generated during the wire binding. In addition, the lubricating rust preventive composition of the present invention does not contaminate the wire rod surface even after application and does not contaminate the pickling bath in the pickling process.

Therefore, by using the lubricating rust preventive composition of the present invention, it is possible to prevent the occurrence of defects of the product due to the binding defects, it is possible to reduce the production cost because no additional cost is required in the post-processing, such as pickling.

Hereinafter, the present invention will be described more specifically.

As mentioned above, the binding lubricating rust inhibitor of the present invention is 5 to 10% by weight of organic aliphatic. 5 to 15% by weight of organic amine salt and the balance of the solvent.

The organic aliphatic is combined with an organic amine, which will be described later, to be adsorbed on the surface of the steel to form a thin coating film having a shape in which a ring of hydrocarbons is arranged perpendicular to the surface. This coating prevents wires from directly contacting each other. Therefore, occurrence of binding defects can be prevented. In addition, the organic aliphatic is combined with the organic amine salt which will be described later to impart cleaning and anti-rusting properties.

The organic aliphatic used in the present invention is a hydrocarbon having a carboxyl group, a chain lower fatty acid having 12 or less carbon atoms, and includes octanoic acid, nonane, sebacic acid, and the like. Silver is preferably about 5 to 10% by weight.

If the content of the organic aliphatic is out of the above range, it is difficult to maintain the pH of the solution at pH 7-8, which is a level necessary to secure the rust resistance. Because it affects sex.

On the other hand, the organic amine salt reacts with the organic aliphatic to form a coating film exhibiting tribological lubrication characteristics, and is dissolved in water to make the properties of the aqueous solution weak alkali to have a rust preventive function.

In the present invention, the organic amine is a compound in which a hydrogen atom of ammonia is substituted with a hydrocarbon group, and aliphatic amines in which all hydrocarbon groups are alkyl groups, for example, ethanol amine (Ethanol Amine) and amino methyl propanol amine (Amino methyl propanol Amine) It is preferable to use etc.

It is preferable that the content of the organic amine salt is about 5 to 15% by weight. When the content of the organic amine is less than 5 wt%, unreacted organic aliphatic is generated when the organic salt is generated through a chemical reaction with organic aliphatic to precipitate and suspended matter. If the content exceeds 15wt%, the residual alkali amine is unreacted, resulting in a strong alkali having a pH of 8 or more, which deteriorates the performance of the pickling bath in alkali corrosion and post-process chemical conversion of the wire rod. This can happen.

The organic aliphatic compound and the organic amine salt of the present invention react with each other to form a coating film. The organic aliphatic-organic amine salt coating film thus formed has a significantly smaller coefficient of friction than the coating film made by a lubricant such as a conventional surfactant. As a result, binding defects caused by friction can be effectively prevented. 4 shows the friction coefficient measurement results of the wire rod coated with the lubricating rust inhibitor of the present invention and the wire rod coated with the conventional surfactant. As shown in Figure 4 it can be seen that the coefficient of friction of the wire rod coated with the lubricating rust inhibitor of the present invention is significantly low.

On the other hand, various metal surfaces and abrasion surfaces may be charged by a mixture of oxidizing and acidic materials, and may be combined with organoaliphatic to generate metal stone gum. The formation of such metallurgical stones may act as a contaminant in pickling processes. However, in the present invention, the organic fatty acid-amine salt produced by the reaction of the organic aliphatic and organic amine salt is adsorbed on the surface of the wire and performs lubrication and rust prevention primarily, and is completely dissolved when entering the pickling bath in the second time. It can prevent contamination and prevent recontamination on the wire surface. The organic fatty acid-amine salt dissolved in the pickling bath absorbs the wire rod and acts as a pickling activator.

On the other hand, the lubrication performance and the rust prevention performance is changed according to the content of the organic aliphatic and organic amine salt, when the content of the organic aliphatic is added in an appropriate amount compared to the organic amine salt, the lubricating performance is excellent. At this time, the content of organoaliphatic is appropriate compared to the organic amine salt is an organic fatty acid-amine salt is generated by the reaction of the organic aliphatic and organic amine salt, the carbon number of the alkyl group of the organic aliphatic and the hydrogen atom of ammonia This means that a proper amount is added at a predetermined ratio according to the carbon number of the substituted hydrocarbon group.

On the other hand, when the content of the organic amine salt is relatively increased, the rust preventing property is excellent. This is because when the content of the organic amine salt increases, the pH rises, and the fluidity and water solubility are improved.

On the other hand, the lubricating rust inhibitor composition of the present invention may optionally further include an extreme pressure (EP) of 0 ~ 5 wt%.

The extreme pressure agent chemically reacts with the metal surface by heat generation by local metal fusion when the lubrication film (coating film) breaks at the contact surface of the frictional part between the wire rods, thereby causing metal-to-metal contact. By forming the material at a high speed to prevent friction, abrasion and burning of the wire rod. As the extreme pressure agent, a phosphate ester-based compound may be used, and more specifically, a substance in which ethylene oxide is added to the phosphate ester may be used. At this time, the content of the extreme pressure agent is preferably about 0 to 5% by weight. This is because when the extreme pressure agent is added in excess of 5% by weight, the residual-adsorption on the surface of the wire rod causes deterioration of the rust preventive performance and may impair lubricity.

On the other hand, the lubricating rust preventive agent of the present invention may further include other additives to assist the anti-rust properties and pickling treatment properties in addition to the above components.

Examples of the other additives that may be used in the present invention include additives for improving water resistance for corrosion prevention (Ethylenediaminetetraacetate), corrosion inhibitors (Triazole), anti-rust additives for improving antirust properties, and the like (Fatty acid-amine soap), In this case, the other additives are preferably added at 5% or less in consideration of economical efficiency. Since the additives are generally expensive, an appropriate amount may be used in consideration of economical efficiency and cost-effectiveness.

The lubricating rust inhibitor of the present invention is prepared by reacting the above components with pure water. Applying a thin lubricating rust preventive agent to the wire rod surface and then binding it with a binding machine will not only prevent friction flaws and frictional tears when binding the wire rod, but also improve cleaning and rust resistance. No contamination occurs during processing. At this time, in order to distribute the lubricating rust inhibitor evenly on the wire surface, it is more preferable to spray in the mist method, not the spray method.

Hereinafter, the present invention will be described in more detail with reference to specific examples.

Example 1

70% by weight of pure water was added to the reactor, and the temperature was raised to 60 ° C. 10 wt% of two organic amine salts (ethanol amine, aminomethylpropanol amine) are added to pure water, followed by stirring with a stirrer for 20 minutes. Then, 7 wt% of two organic aliphatic compounds (octanoic acid, nonane) was added thereto, the production reactor was sealed, and the temperature was maintained at 60 ° C, followed by stirring with a stirrer for 90 minutes. Then, after adding 3% by weight of the extreme pressure additive, 2% by weight of other additives (Ethylenediaminetetraacetate) to the reactor, the temperature was maintained at 60 ℃, stirred by a stirrer and reacted for 90 minutes to prepare a lubricating rust inhibitor of the present invention.

Invention

6 wire rods (Invention 1 ~ 6) after winding cold wire rod with chemical composition of SWRCH45F (0.45wt% C-0.2wt% Si -0.75wt% Mn) with a cross section diameter of 25mm and weight of 1.9 ton ) Was sprayed into the mist with the lubrication solution prepared in Example 1, respectively, followed by binding in the binder. The binding pressure was 20 tons. Then, the following evaluation methods were used to evaluate the height per ton, the number of binding defects, the occurrence of rust, the surface contamination, pickling contamination, and the like. The evaluation results are shown in Table 1.

<Comparative Materials>

For comparison, wire rods of the same composition (comparative materials 1 to 4) without spraying the lubricating solution and wire rods of the same composition (comparative materials 5 to 10) coated with an anionic surfactant (forward / eye oil holding), which was conventionally used as a lubricating solution. ) Was bound under the same conditions as the invention. Then, the following performance evaluation methods were evaluated for the height per ton, the number of binding defects, whether the rust occurs, whether the surface contamination, pickling contamination and the like. The evaluation results are shown in Table 1.

<Evaluation method>

Height per ton

After binding, the length of the product was measured and divided per ton to measure the height per ton.

Bond Fault amount

The product was dismantled before it was stored in the warehouse, and the part where the joint flaw occurred was visually checked and the number of the flaw was counted and recorded. Except for the part where the surface crack of the surface layer was slightly stripped of the friction scratches, the severe scratches digging into the matrix were counted.

Surface contamination

Surface contamination was visually observed whether or not there were traces of the spray solution in the state of binding in the warehouse after lubricating rust preventive injection. When the product was observed at a distance of 1m, it was evaluated that surface contamination occurred.

Pickling pollution

Pickling contamination is measured by measuring the turbidity of the pickling solution after pickling the specimens by cutting 100 parts of the sample sprayed with 100 mm units in a bath with hydrochloric acid (HCl) concentration such as a pickling bath. It was. In particular, the presence or absence of debris generated in the solution and on the surface was observed. The turbidity was specified as an index of whiteness, and was considered contamination when the whiteness was inferior to the turbidity of Comparative Material 1. In addition, each new specimen of the test sample and the comparative material was put back into the used pickling bath to measure the weight after the scale was pickled. If the difference of more than 0.5% compared to the weight loss rate of the comparative material, it was finally evaluated as pickling contamination.

Outgoing  Occur

The application was observed for 2 months with the applied solution sprayed product in a certain space in the warehouse in the air, and if the area of rusting was severe or inferior to the comparative material 1 other than the natural outbreaking part such as the scale dropout part, It was evaluated that the call occurred.

TABLE 1

[Example 2]

Cold-formed spring steel SAE9254S (0.55 wt% C-1.4 wt% Si-0.7 wt% Mn-0.7 wt Cr-other Fe and impurities) was coated with the lubricating antirust solution prepared in Example 1, and then the product was After applying the lubricating antirust solution of Inventive Material 7, Example 1, bound by 5 coils twice per month, and applying the lubricating antirust solution of Inventive Material 8, Example 1, bound 3 times per month, Invention 9 was prepared.

After removing the scale by mechanical peeling the invention materials 7 to 9, after reducing the cross-sectional area in a little fresh wire, manufactured in the form of a bar of about 2 to 4m, using a vortex flaw detector whether the surface is flawed Judging from, if the flaw was determined to be defective. The results are shown in Table 2.

For comparison, the wire rod which was not coated with the lubricating antirust solution of the present invention was bound by 10 coils to prepare a comparative material 11, and manufactured in the form of a bar in the same manner as the invention materials 7 to 9, and then it was determined whether or not there was a defect. The results are shown in Table 2.

TABLE 2

division Comparative Material 11 Invention Material7 Invention Material 8 Invention Material 9 Product Size (diameter) 14 mm 14 mm 14 mm 14 mm Coil N number 10 5 5 5 Vortex flaw detector
Inspection defect rate (%) 3.1 1.40 0.96 1.62 Ave = 1.33

SAE9254S, a cold forming spring steel, is used as the material of the current gas spring for automobiles and requires the strictest quality standards among preemptive products.If there is a small defect, it is broken during molding, or it is mounted on the car and is repeatedly loaded. Hazardous situations occur that can result in breakage and transition to a car accident. Therefore, in order to prevent this, automakers make bar after drawing and check whether there is any defect on the surface by using vortex flaw detector, and if there is a defect, treat it badly.

As shown in Table 2, in the case of comparative material 11, the defect rate was 3.1% as a result of the vortex flaw detector inspection, and three of the 100 bars were not used as products and had to be discarded. However, in the case of the invention materials 7 to 9 coated with the lubricating rust preventive solution of the present invention, it can be seen that the vortex flaw detector inspection failure rate is reduced to 0.96 to 1.62%.

The vortex flaw inspection failure rate contains the causes of frictional defects during transportation and handling, and the defects generated during binding, so that the part minus 1.33% of defects out of 3.1% of defects can be regarded as tearing defects generated during binding. . As such, when the lubricating rust preventive agent of the present invention is used, the binding flaw generated during the binding is almost completely removed, and as a result, an excellent effect of removing the cause of more than 60% of the vortex flaw detector inspection defects can be obtained.

Example 3

SWRCH45FS used for automobile shock absorber is used as the wire rod, and after applying the lubricating rust preventive agent of Example 1 to the wire rod, the wire coil subjected to the binding process was mechanically peeled off, and then made a bar ( Invention 10).

In addition, for comparison, a bar was made using a wire coil subjected to the binding process without applying a lubricating rust inhibitor (Comparative Material 12).

Inventive material 10 and Comparative Material 12 were measured for defects by inspection of the vortex flaw detector. The measurement results are shown in Table 3.

[Table 3]

division Total number Number of defects Defective rate(%) Invention Material 11 2,496 73 2.92 Comparative Material 12 3,512 444 12.64

As described in Table 3, the defective rate of Comparative Material 12 reaches an average of 12.64%. In contrast, the defective rate of the inventive material 11 was 2.92%, indicating that the defective rate was significantly reduced.

1 is a view showing a binding defect generated in a conventional wire rod product.

2 is a view showing a stain appearing on the wire surface when applying a conventional lubricant.

3 is a view showing a rust generated in the wire rod coated with a conventional lubricant.

4 is a graph showing the friction coefficient between the wire rod coated with the lubricating rust inhibitor of the present invention and the wire rod coated with the conventional lubricant.

Claims (8)

Organoaliphatic 5-10% by weight. 5-15% by weight of organic amine salt and A lubricating rust preventive composition for preventing a binding flaw including a remainder of a solvent. The method of claim 1, The lubricating rust preventive composition is optionally lubricating rust preventive composition for preventing the binding, characterized in that further comprises 0 ~ 5% by weight of extreme pressure agent. The method of claim 1, The lubricating rust preventive composition further comprises other additives to selectively aid in rust resistance and pickling treatment properties. The method of claim 1, The organic aliphatic is a hydrocarbon having a carboxyl group, and lubricated rust preventive composition for preventing blemishes, characterized in that at least one member selected from chain lower fatty acid compounds having 12 or less carbon atoms. The method of claim 1, The organic amine salt is a compound in which a hydrogen atom of ammonia is substituted with a hydrocarbon group, and the lubricating rust preventive composition for preventing blemishes, characterized in that at least one selected from aliphatic amine salt compounds in which all hydrocarbon groups are alkyl groups. The method of claim 2, The extreme pressure agent is a lubricating rust preventive composition for preventing the binding defect, characterized in that at least one selected from phosphate ester (PHOSPHATE ESTER) compound. The wire rod binding method is characterized in that binding wires are prevented from occurring on the wire rod surface by binding the wire rod after applying the lubricating rust inhibitor composition according to any one of claims 1 to 6 to the wire rod surface. The method of claim 7, wherein The coating method of the wire rod, characterized in that the mist (MIST) injection method.

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