MX2024007762A - Composicion de revestimiento de aislamiento para lamina de acero electrico, lamina de acero electrico y metodo para fabricar la misma. - Google Patents

Composicion de revestimiento de aislamiento para lamina de acero electrico, lamina de acero electrico y metodo para fabricar la misma.

Info

Publication number
MX2024007762A
MX2024007762A MX2024007762A MX2024007762A MX2024007762A MX 2024007762 A MX2024007762 A MX 2024007762A MX 2024007762 A MX2024007762 A MX 2024007762A MX 2024007762 A MX2024007762 A MX 2024007762A MX 2024007762 A MX2024007762 A MX 2024007762A
Authority
MX
Mexico
Prior art keywords
steel sheet
electrical steel
weight
parts
coating composition
Prior art date
Application number
MX2024007762A
Other languages
English (en)
Inventor
Jungwoo Kim
Bongwoo Ha
Donggyu Lee
Taeyoung No
Original Assignee
Posco Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Posco Co Ltd filed Critical Posco Co Ltd
Publication of MX2024007762A publication Critical patent/MX2024007762A/es

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
    • C23C22/08—Orthophosphates
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
    • C23C22/08—Orthophosphates
    • C23C22/20—Orthophosphates containing aluminium cations
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1277—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular surface treatment
    • C21D8/1283—Application of a separating or insulating coating
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/66—Additives characterised by particle size
    • C09D7/67—Particle size smaller than 100 nm
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/66—Additives characterised by particle size
    • C09D7/68—Particle size between 100-1000 nm
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/66—Additives characterised by particle size
    • C09D7/69—Particle size larger than 1000 nm
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
    • C23C22/08—Orthophosphates
    • C23C22/18—Orthophosphates containing manganese cations
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
    • C23C22/08—Orthophosphates
    • C23C22/22—Orthophosphates containing alkaline earth metal cations
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
    • C23C22/74—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process for obtaining burned-in conversion coatings

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Wood Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Nanotechnology (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Soft Magnetic Materials (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Laminated Bodies (AREA)
  • Manufacturing Of Steel Electrode Plates (AREA)

Abstract

Una composición de revestimiento de aislamiento para una lámina de acero eléctrico de acuerdo con una modalidad de ejemplo de la presente divulgación contiene, con respecto a 100 partes en peso de un contenido sólido, de 30 a 60 partes en peso de un compuesto orgánico/inorgánico en el que las nanopartículas inorgánicas están sustituidas en una resina, de 15 a 45 partes en peso de un fosfato metálico, de 10 a 40 partes en peso de caolín, de 1 a 10 partes en peso de un dispersante inorgánico y de 0.1 a 5 partes en peso de una estructura de carbono.
MX2024007762A 2021-12-22 2022-12-21 Composicion de revestimiento de aislamiento para lamina de acero electrico, lamina de acero electrico y metodo para fabricar la misma. MX2024007762A (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020210185155A KR20230095561A (ko) 2021-12-22 2021-12-22 전기강판 절연 피막 조성물, 전기강판, 및 이의 제조 방법
PCT/KR2022/020911 WO2023121272A1 (ko) 2021-12-22 2022-12-21 전기강판 절연 피막 조성물, 전기강판, 및 이의 제조 방법

Publications (1)

Publication Number Publication Date
MX2024007762A true MX2024007762A (es) 2024-07-01

Family

ID=86903032

Family Applications (1)

Application Number Title Priority Date Filing Date
MX2024007762A MX2024007762A (es) 2021-12-22 2022-12-21 Composicion de revestimiento de aislamiento para lamina de acero electrico, lamina de acero electrico y metodo para fabricar la misma.

Country Status (7)

Country Link
US (1) US20250051868A1 (es)
EP (1) EP4455363A4 (es)
JP (1) JP2025501113A (es)
KR (1) KR20230095561A (es)
CN (1) CN118475719A (es)
MX (1) MX2024007762A (es)
WO (1) WO2023121272A1 (es)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3911965B2 (ja) * 2000-05-30 2007-05-09 Ｊｆｅスチール株式会社 耐食性に優れた有機被覆鋼板
KR100544719B1 (ko) * 2001-12-24 2006-01-24 주식회사 포스코 우수한 외관 및 도포작업성이 우수한 절연피막형성 조성물및 이를 이용한 무방향성 전기강판 절연피막 형성방법
BRPI1010688B1 (pt) * 2009-06-17 2019-11-19 Nippon Steel & Sumitomo Metal Corp chapa de aço eletromagnético tendo revestimento isolante e método de produção da mesma
JP5522013B2 (ja) * 2010-12-10 2014-06-18 新日鐵住金株式会社 クロムフリー絶縁皮膜付き電磁鋼板
KR101448598B1 (ko) * 2012-11-12 2014-10-08 주식회사 포스코 절연피막 조성물, 이를 이용한 무방향성 전기강판의 절연피막 형성방법 및 무방향성 전기강판
KR101561280B1 (ko) * 2013-11-27 2015-10-16 주식회사 포스코 무방향성 전기 강판 코팅 조성물, 무방향성 전기 강판 제품의 제조 방법 및 무방향성 전기 강판 제품
KR102177038B1 (ko) * 2014-11-14 2020-11-10 주식회사 포스코 방향성 전기강판용 절연피막 조성물, 이를 이용하여 표면에 절연피막이 형성된 방향성 전기강판 및 이의 제조방법
EP3561014A4 (en) * 2016-12-23 2020-05-27 Posco ELECTRIC STEEL SHEET ADHESIVE COATING COMPOSITION, ELECTRIC STEEL SHEET PRODUCT AND PRODUCTION METHOD THEREFOR
JP6652229B1 (ja) * 2018-09-28 2020-02-19 Ｊｆｅスチール株式会社 クロムフリー絶縁被膜形成用処理剤、絶縁被膜付き方向性電磁鋼板およびその製造方法
KR20230092608A (ko) * 2021-12-17 2023-06-26 주식회사 포스코 전기강판용 절연 피막 조성물, 전기강판, 및 이의 제조 방법

Also Published As

Publication number Publication date
KR20230095561A (ko) 2023-06-29
CN118475719A (zh) 2024-08-09
JP2025501113A (ja) 2025-01-17
WO2023121272A1 (ko) 2023-06-29
EP4455363A4 (en) 2025-04-30
EP4455363A1 (en) 2024-10-30
US20250051868A1 (en) 2025-02-13

Similar Documents

Publication Publication Date Title
BR112014025799A2 (pt) Processo para revestimento de superfícies metálicas com composições de revestimento contendo partículas de um hidróxido de camada dupla
MX2020013378A (es) Dispersion acuosa para activar una superficie metalica y metodo para el fosfatado de la misma.
BR112016007644A2 (pt) composição de revestimento intumescente, processo para formar uma substância intumescente curada, substância intumescente curada, composição de poli-isocianato, e, composição reativa a isocianato polifuncional
ES2421882T3 (es) Junta roscada para tuberías de acero
BR112012022013A2 (pt) método para revestimento pelo menos da superfície interna de um anel de pistão e anel de pistão
ATE377055T1 (de) Strahlungshärtbares elektrisch leitfähiges beschichtungsgemisch
MX343819B (es) Polvo de pulverizacion libre de zinc, capa de pulverizacion termica que contiene cobre, asi como metodo de fabricacion de una capa de pulverizacion termica que contiene cobre.
BRPI0608029A2 (pt) composição, método para fabricar uma composição, substrato de papel ou papelão e artigo
AR078233A1 (es) Composicion lubricante
BRPI0802159A2 (pt) artigo resistente à corrosão, método para selecionar uma substáncia inibidora de corrosão, e, substáncia inibidora de corrosão
CO6680712A2 (es) Láminas de acero para contenedores y métodos de fabricación de las mismas
MX2017002684A (es) Adivito antioxidante liquido sin cenizas para composiciones lubricantes.
CL2017002046A1 (es) Sistema de electrodeposición novedoso
BR112018016379A2 (pt) composição em pó, e, método
MX2024007762A (es) Composicion de revestimiento de aislamiento para lamina de acero electrico, lamina de acero electrico y metodo para fabricar la misma.
MX2021010053A (es) Uso de compuestos de tiol especificos para mejorar la estabilidad de almacenamiento de composiciones en base a resinas epoxi que contienen compuestos de amina.
BR112022004260A2 (pt) Chapa de aço elétrica não orientada, e, agente de tratamento de superfície
SA113340209B1 (ar) تركيبة طلاء قابلة للمعالجة
BR112018077360A2 (pt) revestimentos de alto desempenho para paineis de construção
BR112018011400A2 (pt) ferramenta de extrusão revestida
BR112021018758A2 (pt) Substrato de aço pré-revestido, método para a fabricação do substrato de aço pré-revestido, método para a fabricação de um conjunto, conjunto de pelo menos um primeiro substrato metálico na forma de um substrato de aço pré-revestido e uso de um conjunto
BR112018067894A2 (pt) chapa de aço para endurecimento, elemento endurecido e método para fabricação de chapa de aço para endurecimento
MX2024007515A (es) Composicion de recubrimiento aislante para chapa de acero electrico, chapa de acero electrico y metodo para fabricarla.
BR112017018363A2 (pt) folha inorgânica eletricamente isolante, laminado que compreende uma camada inorgânica eletricamente isolante, dispositivo elétrico que compreende uma folha inorgânica eletricamente isolante, e método de produção de uma folha inorgânica eletricamente isolante
AR078092A1 (es) Recubrimiento auto-lubricante y metodo para producirlo