The present disclosure relates to the technical field of biomedical materials, more particularly to a degradable magnesium alloy in-situ composite anastomotic staple and a preparation method thereof. The anastomotic staple, with a composite structure, is mainly composed of Mg—Zn—Nd magnesium alloy with high strength and good plasticity (internal part), and corrosion-resistant MgF.sub.2 (external part), and is formed by in-situ synthesis of MgF.sub.2 with the outer layer of Mg—Zn—Nd magnesium alloy anastomotic staple. The magnesium alloy composite anastomotic staple provided by the present disclosure has good plastic deformation ability and mechanical strength, a low degradation rate, and a high biosafety level, which can meet the in-vivo implantation requirements. In addition, it can gradually degrade in vivo after achieving the medical effects in vivo, avoiding a second operation for removal.

Described herein is a chamber component including a metal layer comprising nickel and a barrier layer of nickel oxide over the metal layer. The barrier layer of nickel oxide may be formed by treating the chamber component with an oxidizing agent comprising hydrofluoric acid and/or nitric acid

Provided is a method of performing pre-paint treatment of an automobile body including a high-tensile steel sheet, in which desirable corrosion resistance can be obtained after painting. A method of performing pre-paint treatment of an automobile body, the method including performing an alkaline degreasing step, a first water-washing step, a chemical conversion treatment step, a second water-washing step, and a cationic electrodeposition painting step, in this order, wherein the chemical conversion treatment step is performed using an chemical conversion treatment agent including zirconium (A), free fluorine ions (B), an allylamine-diallylamine copolymer (C), aluminum ions (D), nitrate ions (E) each at a predetermined concentration; the allylamine-diallylamine copolymer (C) forms an acid addition salt having an anionic counter ion, and the pKa of an acid thereof falls within the range of −3.7 to 4.8; and the content percentage of diallylamine is 80 mol % or more and 98 mol % or less.

A method for forming a metal film includes forming an oxide layer on a to-be-treated surface of a to-be-treated object by bringing the to-be-treated surface into contact with a reaction solution containing fluorine and an oxide precursor, removing fluorine in the oxide layer, supporting a catalyst on the oxide layer by bringing the oxide layer into contact with a catalyst solution, and depositing a metal film on the oxide layer by bringing the oxide layer into contact with an electroless plating liquid.

The instant invention concerns the use of polymers obtained by radical copolymerization of a mixture of (1) acrylic acid; (2) methacrylic acid; and (3) at least one allylcatechol selected from 4-allylbenzene-1,2-diol, 3-allylbenzene-1,2-diol; methylated forms thereof (eugenols); and mixtures thereof, for treating a metallic surface intended to be adhesive-bonded to another surface, in order to impart a resistance to the adhesive failure to the resulting bonding.

Provided is an electrically insulated component for use in a planar transformer. The insulated component may include a planar transformer conductive component having a first surface, a second surface and a plurality of edges. The insulated component may also include a first layer including an oxidized metal coating, as well as a second layer including an electrophoretically deposited (EPD) insulating coating. The EDP coating may include a polymer and an inorganic material. The first layer and the second layer may cover at least the first surface and the plurality of edges of the conductive component and the first layer may be disposed between the conductive component and the second layer. Also provided is a method of manufacturing of the electrically insulated component.

Provided is an electrically insulated component for use in a planar transformer. The insulated component may include a planar transformer conductive component having a first surface, a second surface and a plurality of edges. The insulated component may also include a first layer including an oxidized metal coating, as well as a second layer including an electrophoretically deposited (EPD) insulating coating. The EDP coating may include a polymer and an inorganic material. The first layer and the second layer may cover at least the first surface and the plurality of edges of the conductive component and the first layer may be disposed between the conductive component and the second layer. Also provided is a method of manufacturing of the electrically insulated component.

A coating, a method for coating surfaces, and the coated surfaces. The method includes providing a substrate with a cleaned metal surface; contacting and coating the metal surface with an aqueous composition having a ph of from 0.5 to 7.0 and in the form of a dispersion and/or a suspension; optionally rinsing the organic coating; and drying and/or baking the organic coating, or optionally drying the organic coating and coating same with a similar or another coating composition thereto. The composition contains a complex fluoride in a quantity of 1.1 10.sup.−6 mol/l to 0.30 mol/l based on the cations. An anionic polyelectrolyte in a quantity of 0.01 to 5.0 wt % based on the total mass of the resulting mixture is added to an anionically stabilized dispersion made of film-forming polymers and/or a suspension made of film-forming inorganic particles.

A coating, a method for coating surfaces, and the coated surfaces. The method includes providing a substrate with a cleaned metal surface; contacting and coating the metal surface with an aqueous composition having a ph of from 0.5 to 7.0 and in the form of a dispersion and/or a suspension; optionally rinsing the organic coating; and drying and/or baking the organic coating, or optionally drying the organic coating and coating same with a similar or another coating composition thereto. The composition contains a complex fluoride in a quantity of 1.1 10.sup.−6 mol/l to 0.30 mol/l based on the cations. An anionic polyelectrolyte in a quantity of 0.01 to 5.0 wt % based on the total mass of the resulting mixture is added to an anionically stabilized dispersion made of film-forming polymers and/or a suspension made of film-forming inorganic particles.

Provided are stainless steel for a separator of a polymer electrolyte membrane fuel cell, which exhibits enhanced hydrophilicity and enhanced corrosion resistance, and a method of manufacturing the same. In the stainless steel for a separator of a polymer electrolyte membrane fuel cell, which exhibits enhanced hydrophilicity and enhanced corrosion resistance, according to an embodiment of the present invention, a ratio of Cr hydroxide/Cr oxide included in a passivation film of the stainless steel ranges from 0.7 to 1.6, and the passivation film has a contact angle (θ) of 70° or less. Thus, not only corrosion resistance may be enhanced by removing a non-conductive film formed on a surface of the stainless steel and forming a new conductive film thereon, but hydrophilicity may also be secured without additional surface treatment such as a separate coating or the like, and thus manufacturing costs may be reduced and productivity may be increased.