Alkaline oxidation blackening treatment process code - EnglishAlkaline Oxidation phosphatizingProcessing Code 1、Applicable scope Provisions of this standard we used alkaline oxidation black treatment

w any defects that affect the use or aesthetics after blackening treatment. 3.3.2 The shape and size of the workpiece should meet the requirements of the relevant national standards, standards or industrial standards. 4、Process requirements 4.1 Pre-treatment Before blackening treatment, the workpiece should be cleaned to remove oil, rust and other impurities. 4.2 Blackening treatment process 4.2.1 The workpiece should be heated to the required temperature in the effective heated zone of the furnace. The temperature should be uniform and stable. 4.2.2 The workpiece should be immersed in the alkaline oxidation solution for a certain period of time to achieve the desired blackening effect. 4.2.3 After blackening treatment, the workpiece should be rinsed with water and then oiled to prevent rust. 4.3 Post-treatment After blackening treatment, the workpiece should be inspected to ensure that the blackening effect meets the requirements. 5、Inspection and acceptance 5.1 Appearance inspection The appearance of the blackened workpiece should be uniform and smooth, and there should be no defects such as peeling, blistering, or uneven color. 5.2 Measurement inspection The size and shape of the blackened workpiece should meet the requirements of the relevant national standards, standards or industrial standards. 5.3 Performance test The corrosion resistance of the blackened workpiece should meet the requirements of the relevant national standards, standards or industrial standards. 6、Quality assurance and packaging 6.1 Quality assurance The blackened workpiece should meet the requirements of the relevant national standards, standards or industrial standards. 6.2 Packaging The blackened workpiece should be properly packaged to prevent damage during transportation and storage