2results about How to "Maintain dimensional accuracy" patented technology

The present application belongs to zinc-nickel alloy plating layer, and particularly relates to an alkaline stripping solution for removing unqualified zinc-nickel alloy plating layer, a preparation method and application thereof. In order to safely and efficiently remove unqualified zinc-nickel alloy plating layer, the present application provides an alkaline stripping solution, which is composed of the following components in terms of mass concentration: main salt: NaOH 100-180 g / L; oxidizing agent: sodium nitrate 180-200 g / L and NaClO 10-20 g / L; complexing agent: salicylaldehyde oxime 30-50 g / L and diethylene triamine 30-50 g / L; corrosion inhibitor: 2-acetylpyrrole or 4-piperidine carboxamide 2-10 g / L; wetting agent: sodium dodecyl sulfate 0.5-1.5 g / L. After the components in the alkaline stripping solution are mixed in proportion, the alkaline stripping solution can be directly used for removing unqualified zinc-nickel alloy plating layer, the stripping rate reaches 0.6-1 um / min, and the stripping temperature range is wide without damaging the substrate.

The invention discloses a heat treatment device for processing high-pressure seamless gas cylinders and a heat treatment method thereof, which relate to the technical field of heat treatment of high-pressure seamless gas cylinders, and comprise a base, a furnace body being installed on the top of the base, a furnace cover being rotatably installed on the end face of one side of the furnace body, a box body being embedded and installed on the end face of the other side of the furnace body, a sliding box being slidably installed inside the furnace body, a compression tube being installed on one side of the outer curved surface of the box body, and an exhaust pipe being installed on the middle part of the end face of one side of the box body. The invention can realize integrated heating and cooling of the gas cylinder, effectively avoid contact between the gas cylinder and the heat exchange medium, effectively avoid oxidation of the metal surface, avoid corrosion caused by the heat exchange medium, avoid heat exchange imbalance caused by temperature change of the heat exchange medium, can perform multiple recycling of energy in the heat treatment process, reduce energy consumption required in the heat treatment process of the gas cylinder, make the device more energy-saving and environmentally friendly, and make the heat treatment work more continuous, stable and efficient.