4results about How to "Increase corrosion rate" patented technology

This application discloses a sulfur-lead composite steel rod and its preparation method, as well as a steel pipe and soluble structural components, solving the technical problem that soluble bridge plugs in the prior art do not meet the high-pressure maintenance requirements of deep wells. The steel rod comprises the following chemical composition in parts by mass: Fe: 90-97.5 parts, C≤0.6 parts; S: 0.1-0.6 parts, Mn: 0.50-3.00 parts, Pb: 0.2-0.3 parts, O: 0.0010-0.0200 parts; the steel rod has composite inclusions; the composite inclusions include an inner core and a continuous or discontinuous outer shell distributed around the inner core, the inner core including manganese sulfide particles, and the outer shell including first lead particles; the steel rod includes a first region, a second region, and a third region arranged sequentially from the inside out; the average equivalent diameter of the composite inclusions in the first region is larger than that in the second region; the number of composite inclusions per square millimeter in any cross-section of the third region is greater than that in the second region. The sulfur-lead composite steel rod provided by this application has high strength and meets the high-pressure maintenance requirements of deep wells.

This invention belongs to the field of corrosion protection technology, specifically relating to a magnetic nano-corrosion inhibitor, its preparation method, and its application. The magnetic nano-corrosion inhibitor is formulated from Fe3O4@imidazoline nanocomposite material, dispersant, synergist, and water in a predetermined mass ratio. The Fe3O4@imidazoline nanocomposite material is obtained by reacting hydrogen peroxide with an imidazoline-based Fe3O4 precursor, which is obtained by reacting ferric chloride, oleic acid, and ethylenediamine. It is applied to equipment requiring corrosion protection in oil and gas field surface gathering and transportation projects. This corrosion inhibitor can adsorb onto the pipeline surface, increasing the toughness of the protective film, enhancing the adsorption effect of imidazoline, providing long-term protection against pipeline corrosion, exhibiting a significant corrosion inhibition effect, and is low in cost, simple to operate, and produces no secondary pollution.

The application provides a preparation method of a BC battery solving a front side wrap plating problem, a BC battery and a photovoltaic system, and relates to the technical field of photovoltaic cells. The method comprises the following steps: after polishing a silicon wafer, a first tunneling layer and a first poly layer are arranged on one side of the silicon wafer in sequence, a boron-doped passivation layer is arranged on the first poly layer, and a first laser opening mold is performed to obtain a first silicon wafer; a second tunneling layer, a second poly layer and a phosphorus-doped passivation layer are arranged on an N+ region of the first silicon wafer; a gap region is divided, a second laser opening mold is performed on the gap region by using a second laser to obtain a second silicon wafer; the second silicon wafer is subjected to rough polishing treatment and texturing treatment in sequence to obtain a third silicon wafer; an aluminum oxide layer is arranged on the surface of the third silicon wafer, and a silicon oxynitride layer is arranged on the surface of the aluminum oxide layer. The method can effectively remove the edge wrap plating layer by adding rough polishing treatment before texturing, so that the edge wrap plating layer can be effectively removed, and a normal textured surface can be prepared.

The application discloses an anti-freezing solution for a heat source tower, which is composed of organic salt, acrylic acid polymer, quaternary ammonium salt, benzotriazole, sodium molybdate, alcohol and water. The anti-freezing solution is obtained by mixing organic salt, acrylic acid polymer, quaternary ammonium salt, benzotriazole, sodium molybdate, alcohol and water, and is used in the anti-freezing process of the heat source tower system in the north. The organic salt is used as an anti-low-temperature agent, and the pyridine quaternary ammonium salt, benzotriazole and sodium molybdate mainly play a corrosion protection role. The anti-freezing solution has obvious synergistic effect among the components, and the freezing point of the obtained anti-freezing solution is lower and more stable. The anti-freezing solution has the characteristics of corrosion resistance to carbon steel, stainless steel and copper, so as to meet the technical requirements of the anti-freezing solution used in the heat source tower heat pump in the north. In addition, the obtained anti-freezing solution also has the characteristics of low cost and good environmental protection.