JPS60202197A - Rust-preventive lubricant and treatment therewith - Google Patents

Abstract

PURPOSE:To provide a rust-preventive lubricant which inhibits rusting and has an excellent lubricating action when applied to the surface of steel material, etc., prepd. by adding polyphosphoric acid and phosphorous ester to a base lubricating oil. CONSTITUTION:The lubricant is prepd. by adding condensed phosphoric acid (e.g. pyrophosphoric or polyphosphoric acid) and at least one of phosphite of formula I and/or II (where R is aryl or alkyl) [e.g. triphenyl phosphite or tris(nonylphenyl)phosphite]. When applied to the surface of steel material, etc., the lubricant functions as both rust inhibitor and lubricant, thus eliminating the need of conventional rustproofing treatment and lubrication with phosphate film and leading to reduction of production cost to a great extent.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a rust-preventing lubricant and a rust-preventing lubrication treatment method, and particularly to a rust-preventing lubricant and a rust-preventing lubrication method suitable for use in cold working, etc. .

[Background of the invention]

As rust inhibitors for steel materials, carboxylic acids and carboxylates (metallic Ca
, Ha, Mg, At, Zn.

Pb, etc.), sulfonate (Na as metal).

(Ca1Ba, Zn, etc.), carboxylic acid esters, alkoxyphenylamines, jetanolamine derivatives, amino alcohols, mono- or silicic acid esters, phosphite esters, and other weighting agents are known. Rust preventive oil made by blending these additives with mineral oil is applied to the surface of steel materials to suppress the occurrence of rust. However, the rust-preventing performance of rust-preventing oils containing these additives varies considerably depending on the conditions of use. For example, when applied to steel plates, etc., sorbitan partial esters, carboxylic acids, etc.
I8-Z 0231) shows good rust prevention performance, but shows poor results in the salt water immersion test method (JIS-Z1801), and there is no rust prevention oil that has excellent rust prevention performance under any usage conditions.

In addition, even when a steel plate coated with anti-rust oil is processed under low processing conditions such as dye drawing, the lack of lubrication can cause mold breakage, wear, and breakage of the molded product. Normally, processing oil is further applied during molding. However, there is a problem that seizure occurs easily because the lubricity of the processing oil is inhibited.Therefore, there is a need for an excellent rust-preventing lubricant that has rust-preventing and slipping effects at the same time.

On the other hand, a rust-preventive lubrication treatment method for cold working (Special Publication No. 57-19159
Publication No.) is known. This treatment method uses water-soluble resin and lubricants such as wax, fatty acids, higher fatty acid esters, metal soap, etc. during the cooling process of hot-rolled steel or edge materials from high temperature (6 oaC) to room temperature. It is immersed in a phosphoric acid aqueous treatment solution containing phosphorus compounds, +! Prepare a film consisting of 8 fats and lubricants.

It is formed on the surface of the wire. The steel material after the coating has been formed has excellent rust prevention performance, but if it is cut to the dimensions intended for plastic working and then used, there will be no lubricating coating on the fractured surface, and the new material will be damaged. It is necessary to perform lubrication treatment. In addition, in the case of large plastic deformation - 'PM When molding something with a rough shape, the steel material may come into direct contact with the die, causing fatal problems such as seizure. It is desired to develop a functional rust-preventing lubricant.

[Purpose of the invention]

An object of the present invention is to provide an excellent rust-preventing lubricant that performs rust-preventing and lubricating functions simply by applying it to the surface of a workpiece such as a steel material or steel plate, and a rust-preventing lubrication treatment method using the same. It is in.

[Requirement of the invention]

The anti-silk lubricant of the present invention contains lubricating oil, condensed phosphoric acid, general formula % (1) (Aryl group, alkyl group) and/or (几0)2PHO...・・・・・・・・・Contains one or more types of phosphites represented by (I[) (几...Aryl group, alkyl group) to have a synergistic effect of rust prevention and lubrication. A new anti-rust lubricant.

The condensed phosphoric acid used in the present invention includes metaphosphoric acid, birophosphoric acid, polyphosphoric acid, etc., but pyrophosphoric acid or polyphosphoric acid is particularly preferable because it becomes a dispersion type when it is not dissolved in lubricating oil.

Examples of phosphites include triphenyl phosphite, tris(nonylphenyl) phosphite, triisooctyl phosphite, diphenylisodecyl phosphite, phenyl diisodecyl phosphite, and triindecyl phosphite.

Tristearyl phosphite, trioleyl phosphite, dibutylhydrogen phosphite.

Examples include di-2-ethylhexylhydrogen phosphite, dilauryl hydroin phosphite, dioleyl hydroin phosphite, and the like.

Examples of lubricating oils used in the present invention include mineral oil, polyolefin oil, polydalicol oil, silicate ester oil,
Diester oil: Synthetic oils such as polyol ester oil, polyphenyl ether oil, fluorine oil, silicone oil, and mixed oils thereof can be used.

When blending insoluble condensed sulfuric acid or phosphorous acid ester with mineral oil, synthetic oil, or a mixture thereof, it is preferable to use an emulsifier to uniformly disperse M into turbidity. The emulsifier can be arbitrarily selected depending on the type of lubricating oil, condensed phosphoric acid, and phosphite ester, but for example, esters of polymeric succinic acid are effective.

The rust-preventing lubricant of the present invention has a rust-preventing function and a lubricating function when the amount of condensed phosphorus (1% by weight) and the phosphite ester is 0.5 times the amount of condensed phosphoric acid added to the lubricating oil. Is it particularly effective when the degree of processing is high in plastic working of steel materials or steel plates? When molding parts with complex shapes, it is recommended to add 3 to 6% by weight of condensed phosphoric acid to the lubricating oil, and 1.5 to 4 times the amount of phosphorous acid added to the lubricating oil. preferred.

The rust-preventing lubricant of the present invention may be applied to the surface of steel materials, steel plates, etc. by coating, spraying, or dipping in the rust-preventing lubricant. Further, the rust-preventing lubricant of the present invention or a steel material to be plastically worked.

After heating one of the steel plates and immersing the metal material in lubricating oil to form a reaction film with rust prevention and lubricant coating on the metal surface, plastic working can be performed. in this case,
The temperature of anti-rust lubricant or steel materials, steel plates, etc. is 50 to 150.
C is preferable.

[Embodiments of the invention]

Examples 1 to 12 Rust-preventing lubrication according to the present invention shown in Table 1, consisting of 88% by weight of mineral oil with a 40C viscosity of 150 re”/8, 4% by weight of birophosphoric acid, and 8% sulfite ester. After immersing the steel plate for rust prevention test and the material for machining performance test in The rust prevention performance and processing performance were evaluated under the following conditions.

Test method for rust prevention performance> (1) Moisture? 1ial test method (based on JI8-Z-0228) This test evaluates the rust prevention performance under high temperature and high humidity conditions. 5 pieces of chromium-molybdenum steel (80M415) with test piece size 20m x 40 and thickness 2m
The specimens were immersed in oil for 1 minute, drained of the oil, and then hung in a constant temperature and humidity chamber at a temperature of 50 R and a humidity of 95 degrees or higher for 20 days, and the state of rust formation on the surface of the test pieces was checked.

(2) Containment test method (based on JIS-Z0231) Direct light, wind ii1. This is to evaluate the rust prevention performance under unexposed storage conditions. The test pieces had the same dimensions and the same material as those used in the wet test method, were coated with oil, and were hung in a room in sets of 5 to examine the state of rust on the surface of the test pieces after being left to stand for 60 days.

(3) Machining performance evaluation method (3-1) Machining conditions (material dimensions) Y ■ Machining rate = 75% Material: Carbide ■ 5 (Mold heating is applied to mold 1 shown in the machining performance diagram in 3-2) Attach the metal band heater 2, increase the metal temperature step by step by 5 to loc, place the lubricated material 3 into the container 4, and use a lactone hydraulic press (processing speed, approximately 5 lb/sec). , 20 pieces were processed at a time, and the highest mold temperature at which no flammability phenomenon occurred on the wood surface after processing was measured.

The higher the temperature, the better the processing performance of the lubricating oil.

(4) The lubricating oils used in the comparative examples are all rust-proof press working oils, but the blending ratio is unknown.

Comparative Example 1 Pace oil: Mineral oil Additives: Chlorine compounds, sulfur compounds Rust inhibitors: Contained Comparative Example 2 Base oil: Mineral oil Additives: Chlorinated hydrocarbons, fatty acids, oleic acid, ester Rust inhibitors: Contained From Table 1 As is clear, the rust-preventing lubricating oil of the present invention is superior to the comparative example in terms of rust-preventing performance and machining performance for steel materials.

Examples 13 to 27 As base oils, polyolefin oil with a viscosity of 100 tm"/S at 40C, polyol ester oil of 58 tn2/8, polyphenyl ether oil of 200 IIoI2/S, silicone oil of 200 rtm"/s and 85 tn2/s.
The rust-preventing lubricating oil of the present invention shown in Table 2, consisting of 88% by weight of polyglycol oil of rm''/8, 4% by weight of pyrophosphoric acid, and 8% by weight of phosphite, was prepared in the same manner as in Examples 1 to 12. The rust prevention performance and processing performance on steel materials were evaluated.The evaluation results are shown in Table 2.

From the results of No. 2, the rust-preventing lubricant of the present invention is superior to the comparative examples shown in Table 1 in terms of rust-preventing performance and machining performance on steel materials, regardless of which base oil is used. I understand that.

Examples 28 to 43 Rust-preventing lubricating oils of the present invention were obtained by adding pyrophosphoric acid and dioleylhydroinphosphite in the amounts shown in Table 3 to mineral oil having a viscosity of 150 ttx''/S at 40C.

This was evaluated for rust prevention properties and processing performance by a wet test and a storage test under the same conditions as in Example 1. The results are shown in Table 3.

As is clear from Table 3, the rust prevention properties and processing performance for steel materials are as follows: 3% by weight of pyrophosphoric acid and 1k of dioleylhydroinphosphite added to 1.5% of pyrophosphoric acid.
When the amount is doubled or more, extremely good results are shown. Further, even when the amount of pyrophosphoric acid added is 2% by weight and the amount of dioleylhydroinphosphite added is the same as that of pyrophosphoric acid, the rust prevention properties and processing performance are superior to those of the comparative examples shown in Table 1.

To Example 44 65 Mineral oil with a viscosity of 150 mg"/8 at 40 tl',
100tran"/8 polyolefin oil, 58mm/S polyol ester oil, 200tan"/
A rust-preventing lubricating oil of the present invention was obtained by adding metaphosphoric acid, polyphosphoric acid, and triisodecyl phosphite to S silicone oil in amounts shown in Table 4. This was evaluated for wetness test and processing performance under the same conditions as in Example 1.

The results are shown in Table 4.

As is clear from the results in Table 4, the rust resistance is excellent.

It can be seen that the machining performance is excellent.

Example 66 A test piece for rust prevention evaluation and a test material for machining performance evaluation were added to 50C and 1 in a rust prevention lubricant having the same composition as Example 12.
The samples were heated to 50C and immersed for t-1 minutes, and the rust prevention properties and processing performance were evaluated under the same conditions as in Example 1. As a result, no rust was observed in the wet test method even after 20 days of standing. Further, as a result of evaluating the workability under the same processing conditions as in Example 1, the workability showed a good result of 350C.

〔Effect of the invention〕

As explained above, according to the present invention, both rust prevention and lubrication functions can be achieved simply by applying a rust prevention lubricant to the steel surface.
There is no need for conventional rust prevention treatment or phosphate coating lubrication treatment, and there is an advantage in that production costs can be significantly reduced.

[Brief explanation of the drawing]

The figure is a cross-sectional view of a forward extrusion mold for evaluating the machining performance of rust-preventing lubricants. l... Mold, 2... Band heater for mold heating, 3.
...Material, 4...Container, 5...Processing tool section. Continuing from page 1 ■ I nt , CI , “mt Separate symbol @ Inventor Toshikazu Narahara Office reference number 3-1-1 Saiwaimachi, Hitachi City Hitachi Research Laboratory, Hitachi, Ltd.

Claims (1)

[Scope of Claims] 1. A rust-preventing lubricating oil characterized in that the lubricating oil contains condensed phosphoric acid and a phosphite ester of the following formula (1) and/or formula (1). (RO)aP ・・・・・・・・・(1)(几0)2PH
O・・・・・・・・・(II) (The middle group in each formula is an aryl group or an alkyl group) 2 Condensed phosphoric acid and the following formula (1) and/or a phosphorous acid ester containing A rust-preventing lubrication treatment method characterized by heating either lubricating oil or steel material to form a rust-preventing lubricant film on the surface of the steel material. (几o)、p・・・・・・・・・(1)(RO)2P
HO... Group/Ota (R in each formula is an aryl group or an alkyl group)