provisions in GB/T 2423.10. The product shall be fixed on the vibration test bench, kept in the normal installation position and tested in the non-working state; the hoses, connectors or other accessories connected with the product shall be installed and fixed properly.Р4.13?Salt Spray TestРThe test shall be carried out as per the provisions in Test Ka: Salt spray test method of GB/T 2423.17.Р4.14?Industrial Solvent TestРThe test shall be performed as per the provisions in the product standards.Р4.15?Surface Protection InspectionР4.15.1?Inspection of Coatings and Chemically Treated LayersРThe metal coatings and chemically treated layers shall be inspected according to the methods specified in QC/T 625.Р4.15.2?Inspection of Paint CoatingsР4.15.2.1?Inspection of appearance of paint coatings