摘要:
Formulations and methods for the electropolishing of metals. The formulations include a solid electrolyte having a type of active particles of resin of ionic exchange charged with an acid solution that generate a chemical activity and an electric activity, and at least a type of moderating particles of the chemical action of the active particles and/or moderating particles of the electric conductivity of the active particles, so that the moderating particles reduce the attacks localized on the surface of the polished part provoked by the exudates of the active particles.
摘要:
Provides an electropolishing treatment method for a stainless steel workpiece, wherein the method comprises the following steps: placing the stainless steel workpiece in an oxalic acid solution and performing supersonic oscillation; performing a first electropolishing treatment to the stainless steel workpiece, wherein the first electropolishing treatment uses the stainless steel workpiece as an anode and 10% to 15% perchloric acid as an electrolyte, and when a constant voltage is set as 12V, the first electropolishing treatment procedure is performed; and performing a second electropolishing treatment to the stainless steel workpiece, wherein the second electropolishing treatment uses the stainless steel workpiece after the first electropolishing treatment as an anode, and an electrolyte consists of ethanol, sulfuric acid and perchloric acid, and when a constant voltage is set as 12V, the second electropolishing treatment is performed to obtain the stainless steel workpiece after the second electropolishing treatment.
摘要:
Method of manufacturing a spectrally selective surface. The method comprises cleaning an outside of a tubular substrate, e.g. by sonicating in acetone, polishing the cleaned outside, and depositing a Co—Cr coating on the polished outside, i.e. the tubular substrate's outside. The Co—Cr coating comprises Co(II) compounds and Cr(III) compounds but no Cr(VI) compounds. By applying a DES electrolyte Cr(III)-ions may be solved in the electrolyte such that a receiver tube arranged in the electrolyte may become coated with a selective Co—Cr coating from Cr(III)-ions, where the optical characteristics regarding absorptance and emittance for the resulting receiver tube are comparable or surpasses traditional black chrome. Thereby use of harmful hexavalent chrome could be avoided, which may achieve more healthy and environmental friendly conditions. Particularly, no harmful Cr(VI)-ions or rest substances comprising them will contaminate ambient air or need to be handled or disposed.
摘要:
The present disclosure generally relates to a sealed metal laminate structure comprising: a metal layer having a first surface and an opposite second surface; a first enamel layer laminated on the first surface of the metal layer, except at an exposed metal protrusion at a perimeter edge of the sealed metal laminate structure; a second enamel layer laminated on the second surface of the metal layer, except at the exposed metal protrusion at the perimeter edge of the sealed laminate structure; and a phosphate sealer deposited on the exposed metal protrusion of the sealed metal laminate structure. The present disclosure also relates to a metal laminate structure without a phosphate sealer. In addition, systems and methods for treating workpieces, including metal laminate structures, are discussed.
摘要:
An electropolishing or electroplating system and method for metal conveyor belts is described. In some embodiments, the system has a metal conveyor belt held in constant tension; a tank for holding an electrolytic fluid, the tank having an interior space suitable to contain the fluid, a metal plate and the metal conveyor belt; and an electrical current supply. In an electropolishing application, the current passes from the metal conveyor belt, through the fluid and into the metal plate. In an electroplating application, the current passes from the metal plate, through the fluid and into the metal conveyor belt.
摘要:
A bioabsorbable medical device or a medical device component comprises an absorbable component prepared by subjecting a prefabricated component of an iron-based raw material to ion nitriding. Substance composition inside the absorbable component changes with the depth from the surface. The absorbable component comprises at least a first part and a second part. The first part surrounds the second part. Hardness of the first part is higher than hardness of the second part. An interface exists between the first part and the second part. A crack generated in the first part is impeded by the interface when extending to the second part. On the premise of ensuring radial stand strength, the bioabsorbable medical device or medical device component and a preparation method thereof reduce wall thickness of an iron-based stand, improve a stand corrosion rate and malleability, and achieve broader adaptability.
摘要:
A method of producing a graphene coating on a stainless steel surface, the method comprising the steps of electrochemically polishing of the stainless steel surface, and heating the polished stainless steel surface in contact with a carbon precursor.
摘要:
One aspect of the invention is a method of surface alloying stainless steel, In one embodiment, the method includes providing a stainless steel surface having an initial amount of iron and an initial amount of chromium; and preferentially removing iron from the stainless steel surface to obtain a surface having an amount of iron less than the initial amount of iron and an amount of chromium greater than the initial amount of chromium. Another aspect of the invention is a unitary stainless steel article.
摘要:
A method for cleaning a surface of stainless steel includes: a rinsing step, in which a stainless steel tube having carbon residues is subjected to surface cleaning; a disposition step, in which the tube is disposed into an electrolytic tank containing therein a stainless steel cylinder and positive and negative electrodes of a power source are respectively connected to the tube and the cylinder; an electrolyte preparation step, in which phosphoric acid and sulfuric acid are mixed and then added with glycerin to prepare an electrolyte, which is then added into the tank; an electricity supplying step, in which electrical power is supplied to the tube and the cylinder with the current density flowing through the electrolyte, the temperature, and time period of supplying electricity being properly set; and a cleaning step, in which the electrolyte removes carbon residues from a surface of the tube and polishes the surface.
摘要:
The present invention describes a cost-saving and environmentally conserving process for the electrochemical polishing of steel, in particular of low-alloy steels. The workpieces are rinsed after electropolishing in an arid phosphoric acid-sulfuric acid-bath in a first rinsing step with a phosphoric acid-containing solution, whereby a chemical attack on the freshly polished surfaces is avoided without the use of environmentally harmful and unhealthy inhibitors such as chromates. By recycling of the acids and the rinsing solution, these acids and solutions can be regenerated, whereby the process can be designed effluent-free.