Composition for plating forming rolls

FIELD: electrochemical processes.

SUBSTANCE: object of invention is plating forming rolls designed for rolling electrode bands. Composition contains varnish KCh-0125, ammonia, 50% fluoroplastic suspension F-4D, filling compound composed of silica, ethanol, and anionic surfactant-containing technical product at their ratio 10:(0.5-15):1.0, and water.

EFFECT: enabled plating of coating showing high wear resistance and low adhesion for rolled materials.

1 tbl

 

The invention relates to the chemical industry, in particular to the coating method of electrodeposition on mill rolls for rolling an electrode tape.

Known Composition for coating by electro-deposition on mill rolls" (A.S. No. 1578165, 09 D 5/44, 15.07.90. B. I. No. 26), consisting of lacquer HT-0125, ammonia, water mixture (tropeolin OOO, silicon dioxide) and water.

However, the coatings obtained from the compositions have enhanced adhesion to the active mass of the positive electrode of chemical current sources on the basis of solid depolarizers and soot, as well as low wear resistance, which reduces the surface quality of rolled tape, marriage bands and reduced service life of the rolls, in addition, this composition is insufficient stable over time (8-10 months).

The authors faced the problem of improving the surface quality of rolled strips, increase service life of the rolls by reducing the adhesion of the tape to the surface of the rolls, as well as increased stability of the composition over time (14-16 months).

The problem is solved in that the composition containing the Lac HT-0125, ammonia, water and a mixture of water, added 50%PTFE suspension f-4D, and as a filler taken a mixture of silicon dioxide and estanol in the ratio of 10:0.5 to 15:1,0 components and integration of the s in the following ratio; wt.%

Lac HT-012512-15
Ammoniaof 1.1-1.3
Suspension fluoroplastic f-4D20-25
Filling mixturefrom 4.2 to 6.4
Water100

The essence of the invention lies in the fact that the introduction of the 50%PTFE suspension f-4D and mixtures of silicon dioxide with atenolol in the composition for electrodeposition increases the stability of the composition over time (up to 14-16 months), and the coating has a lower adhesion to the surface of the rolled materials.

Used in the composition of the lacquer HT-0125 made at the Yaroslavl paint factory and consists of a partial ester multiserving of polybutadiene, phenolic resin, BHT, triethylamine, isopropyl alcohol, diacetone alcohol.

Ammonia is used as the neutralizer. Used an aqueous solution of ammonia.

Ethanol is inhibitron corrosion and is a technical product containing anionic surfactants - Tris-(2-octaethyl) ammoniacal-bansilalpet, Cn+H2n+1C6H4SO3NH(CH2CH2OH)3where n=8-10. Liquid, soluble in water (Chemical encyclopedia. Moscow, "Soviet encyclopedia" 1983. - 714 S.).

As readhesion additives used a 50%suspension of PTFE f-4D.

The preparation of the composition is the following. Mix the varnish HT-0125 ammonia, mixing produce for 5-10 minutes at room temperature. The resulting composition is tested for solubility in water and measure the pH. At pH 7,1-7,5 composition is diluted with water. At the same time at a temperature of 18-25°preparing a mixture of silicon dioxide with atenolol in the ratio of 10:0.5 to 10:1,0, enter PTFE suspension is thoroughly mixed until a homogeneous mass and injected into an aqueous solution of varnish HT-0125 and ammonia. The resulting composition is stirred for 3 hours with a mechanical stirrer. The quality of the finished composition control of pH, conductivity (see table).

The coating was obtained by applying the composition to the surface of the rolls by the electroplating method at a temperature of 18-25°C, the voltage of 60 V for 2 minutes.

Samples obtained coating was washed in running distilled water and subjected to heat treatment at 350-370°C for 40 minutes.

The adhesion of the coating to the surface of the rolls is determined by the regional contact angle, measured in degrees. The friction coefficient is determined on the car friction velocity relative sliding 0.048 m/s, the unit load of 5 MPa.

The test results of the coating depending on the composition listed in the table. Ka is seen from the test results of the coating, obtained by the electroplating method proposed composition, possess high wear resistance, low friction coefficient and low adhesion to laminate materials. All these properties of the coatings increase the service life of the rolls and improve the surface quality of rolled tape (decrease roughness, lack of tear-out recyclable material from the surface of the tape).

Table
ComponentsComposition (wt.%)
123The placeholder
Lac HT-012512141511
Ammonia1,11,21,30,9
50% suspension of PTFE f-4D202,525-
Filling mix:
Silicon dioxide456-
Estanol0,20,250,4-
Filling mixture (tropeolin OOO, silicon dioxide)-- -the 5.7
Water100
Properties of composition
pH7,47,47,67,2
Conductivity, Cm/m0,040,040,040,04
Properties of the coating
Adhesion, MPa2,8-3,02,9-3,02,9-3,03,3-3,7
Wear and tear coverage, um/h0,030,030,030,06
Wetting angle, deg140145145120
Stability in time months.14-16

Composition for coating by electro-deposition on the mill rolls, including lacquer HT-0125 based on incomplete ether malaysiaand polybutadiene, phenol resin, ammonia and water mixture and water, characterized in that it contains as filling a mixture of a mixture of silicon dioxide and estanol technical product containing anionic surfactant, taken in the ratio of 10:0.5 to 15:1,0, and an additional 50%PTFE suspension 4D, the next time autosizecomponents, wt.%:

Lac HT-012512-15
Ammoniaof 1.1-1.3
a 50%suspension of PTFE 4D20-25
Filling mixturefrom 4.2 to 6.4
WaterRest



 

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