RU2015124017A

RU2015124017A - CHROMIUM-CHROMIDE OXIDE COATINGS APPLIED TO STEEL SUBSTRATES FOR PACKAGING APPLICATIONS AND METHOD FOR PRODUCING SUCH COATINGS

Info

Publication number: RU2015124017A
Application number: RU2015124017A
Authority: RU
Inventors: Жак Хюберт Ольга Йозеф ВЕЙЕНБЕРГ; Михил Стег; Ян Пауль Пеннинг; ЗВАРТ Илья ПОРТЕГИС; ВОЙС Арнауд Корнелис Адриан ДЕ
Original assignee: Тата Стил Эймейден Б.В.
Priority date: 2012-11-21
Filing date: 2013-11-21
Publication date: 2017-01-10
Also published as: CA2891605A1; WO2014079910A1; ES2716565T3; BR112015011731A2; CA2891605C; JP6407880B2; EP2922984A1; RU2015123743A; RS58266B1; RS58504B1; CA2892114C; BR112015011465B1; ZA201503508B; US20150337448A1; EP2922984B1; JP2016505708A; US20150329981A1; WO2014079911A2; BR112015011731A8; JP6407879B2

Claims

1. A method of producing a coated steel substrate for packaging applications by depositing a metallic chromium-chromium oxide coating on a substrate for packaging applications, comprising:

1. recrystallized annealed black sheet of single or double rolling from packaging steel or

2. cold-rolled and re-annealed black sheet,

comprising electrolytic deposition on said substrate of said coating metal chromium-chromium oxide in a single technological stage from an electrolyte containing a mixture of a trivalent chromium compound, a chelating agent, an optional salt increasing conductivity, an optional depolarizer, an optional surfactant, to which an acid or base is optionally added to adjust the pH, the electrolyte does not contain a buffer substance and at the same time a sufficiently high cathodic current density is supplied for precipitation denia metal chromium.

2. The method according to claim 1, wherein the chelating agent contains an anion of formic acid, the salt increasing the conductivity contains an alkali metal cation, and the depolarizer contains a bromide-containing salt.

3. The method according to any one of paragraphs. 1 and 2, while the cation in the chelating agent that increases the conductivity of the salt and the depolarizer is potassium.

4. The method according to any one of paragraphs. 1 and 2, moreover, during electrodeposition, a layer of metallic chromium oxide of chromium is deposited on black metal with a total chromium content of at least 20 mg / m ² , preferably at least 40 mg / m ² , and more preferably at least 60 mg / m ² .

5. The method according to any one of paragraphs. 1 and 2, moreover, during electrodeposition, a layer of metallic chromium oxide of chromium is deposited on black metal with a total chromium content of not more than 140 mg / m ² , preferably not more than 110 mg / m ² .

6. The method according to any one of paragraphs. 1 and 2, wherein the coated substrate is further provided with an organic coating on one or both sides of the thermosetting organic coating at the varnishing stage or with a thermoplastic single layer or thermoplastic multilayer polymer coating at the stage of pressing the film or the stage of direct extrusion, preferably with a thermoplastic polymer coating is a polymer coating system comprising one or more layers containing thermoplastics, such as polyesters or polyolefins, acres polymers, polyamides, polyvinyl chloride, fluorocarbon polymers, polycarbonates, styrene resins, ABS plastics, chlorinated polyethers, ionomers, urethane resins and functionalized polymers; and / or their copolymers; and or mixtures thereof.

7. The method according to any one of paragraphs. 1 and 2, an anode is selected which reduces or eliminates the oxidation of Cr (III) ions to Cr (VI) ions at the electrodeposition stage, such as a gas diffusion anode.

8. A coated steel substrate for packaging applications, comprising:

2. cold-rolled and re-annealed black sheet,

moreover, one or both sides of the substrate is coated with a metal chromium-chromium oxide coating layer obtained in a single technological stage using the process of trivalent chromium electrodeposition, the coated substrate is additionally provided with an organic coating consisting of a thermoplastic multilayer polymer coating, preferably a thermoplastic polymer coating is a polymer coating system (s) comprising one or more layers containing thermoplastics such as polyester s or polyolefins, acrylic resins, polyamides, polyvinyl chloride, fluorocarbon polymers, polycarbonates, styrene resins, ABS plastics, chlorinated polyethers, monomers, urethane resins and functionalized polymers; and / or their copolymers; and / or mixtures thereof.

9. The coated substrate for packaging applications of claim 8, wherein the metal chromium-chromium oxide layer has a total chromium content of at least 20 mg / m ² , preferably at least 40 mg / m ² , and more preferably at least 60 mg / m ² .

10. The coated substrate for packaging applications according to claim 8 or 9, wherein the metal chromium-chromium oxide layer has a total chromium content of not more than 140 mg / m ² , preferably not more than 110 mg / m ² .

11. The coated substrate for packaging applications according to claim 8 or 9, wherein the organic coating consists of a thermoplastic single layer or multilayer polymer coating, wherein the thermoplastic polymer coating is a polymer coating system (s) comprising one or more layers, containing a polyester, and / or its copolymers, and / or mixtures thereof.