Method for rapidly removing paint layer

Abstract

A method for rapidly removing a paint layer comprises the following steps that 10-15 g / L of sodium hydroxide, 20-25 g / L of sodium carbonate and 30-50 g / L of trisodium phosphate are matched according to the content to form an electrolytic bath; the formed electrolytic cell is heated to 70-80 DEG C; putting a product of which the paint layer needs to be removed into an electrolytic bath, and removing the paint layer under the condition that the current density is (0.5-1.5) A / dm < 2 >; the paint layer falls off; taking out the product; and checking whether the removal is complete. According to the invention, a new process, a new technology exploration and a curing removal process flow are carried out aiming at a removal technology for removing an electroplated paint layer, and the following technical requirements are met at the same time: the production efficiency is improved, and the production cost is reduced; the subsequent processing is prevented from being influenced by removing the paint layer; the harm to the body of an operator is reduced; the pollution to the environment is reduced; the problem of long paint layer removal processing period puzzling people for a long time is solved, the product appearance and performance requirements are met, and the product quality is improved.

Description

Technical Field

[0001] The invention relates to a method for quickly removing a paint layer, belonging to the technical field of paint layer removal. Background Art

[0002] Spraying paint on the exterior of relay products after electroplating is a method to protect the relay from various environmental factors and ensure the stability and reliability of its performance. It plays a role in anti-corrosion and rust prevention, insulation protection, improving heat dissipation performance, aesthetics and identification, and reducing electromagnetic interference. However, the paint layer is easily scratched during the painting process or the processing procedures after painting, so it is necessary to remove the paint layer, remove the plating layer and then re-treat the surface.

[0003] At present, isoamyl acetate and efficient paint stripper are used to remove the paint layer. Among them, isoamyl acetate adopts the mode of soaking, needs to soak for 24 hours, the paint layer can fall off, the processing cycle is long, and isoamyl acetate is toxic, inflammable and explosive, and is harmful to the human body; High-efficiency paint stripper is used to remove the paint, that is, the product is placed in the box, the paint stripper is sprayed on the surface of the product paint layer, and the surface paint layer is removed after fully reacting for about 10 minutes to wait for reaction. If there is a paint layer that is not completely withdrawn, the operation is repeated. Although the processing cycle is short for using efficient paint stripper to remove the paint layer, it is not easy to remove cleanly, and the processing cost is high. Isoamyl acetate and efficient paint stripper remove the paint layer and increase the difficulty of the back process to withdraw the coating. Therefore, the conventional method of removing the paint layer in the field of aviation industry is not only long in cycle, not clean, but also harmful to the operator's body. Summary of the invention

[0004] The present invention aims to solve the problem of long-standing troubles in the process of removing the paint layer, and to meet the requirements of product appearance and performance in order to improve the technical problem of product quality.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: A method for quickly removing a paint layer comprises the following steps: Step 1: Sodium hydroxide (10-15) g / L, sodium carbonate (20-25) g / L, and trisodium phosphate (30-50) g / L are mixed according to the content to form an electrolytic cell; Step 2: Heat the electrolytic cell to (70-80)°C; Step 3: Place the product to be depainted into the electrolytic cell and ensure that the current density is (0.5-1.5) A / dm 2 Remove the paint layer; Step 4: The paint layer falls off; Step 5: Take out the product; Step 6: Check whether it is removed cleanly.

[0006] The beneficial effects of adopting the above technical solution are: The present invention is to explore new processes and technologies for removing paint layers after electroplating, solidify the removal process flow, and meet the following technical requirements: 1. Improve production efficiency and reduce production costs; 2. Avoid affecting subsequent processing due to removal of the paint layer; 3. Reduce the harm to the operator's body; 4. Reduce environmental pollution; It solved the problem of long paint removal cycle that has troubled us for a long time, met the product appearance and performance requirements, and improved product quality. DETAILED DESCRIPTION

[0007] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0008] The present invention is a process flow for optimally removing the paint layer without affecting the subsequent processes. Sodium hydroxide (10-15) g / L, sodium carbonate (20-25) g / L, and trisodium phosphate (30-50) g / L are used to form an electrolytic cell. The temperature is (70-80) °C and the current density is (0.5-1.5) A / dm 2 Remove the paint layer.

[0009] Operation process: Mix sodium hydroxide, sodium carbonate and trisodium phosphate according to the content → heat to (70-80)℃ → put the product to be painted into the electrolytic cell → the paint layer falls off → take out the product → check whether it is removed completely.

[0010] The present invention is a study and application of a technique for removing unqualified paint layers. The method relates to a chemical method for rapidly removing paint layers. The present invention relates to the field of aviation manufacturing technology, in particular to the appearance treatment of unqualified paint layers.

Claims

1. A method for quickly removing a paint layer, characterized in that: It includes the following steps: Step 1: Sodium hydroxide (10-15) g / L, sodium carbonate (20-25) g / L, and trisodium phosphate (30-50) g / L are mixed according to the content to form an electrolytic cell; Step 2: Heat the electrolytic cell to (70-80)°C; Step 3: Place the product to be depainted into the electrolytic cell and ensure that the current density is (0.5-1.5) A / dm 2 Remove the paint layer; Step 4: The paint layer falls off; Step 5: Take out the product; Step 6: Check whether it is removed cleanly.