The materials used for the gantry crane must be suitable for its working environment. Before selecting materials, the gantry crane manufacturer must first understand the detailed requirements for the use of the crane equipment, especially the gantry crane and semi gantry crane operating outdoors, which must ensure the first-class quality in terms of material selection, free of defects and long service life.
For some lifting equipment that must contact with water, chemicals, etc., the standard requirements are: the equipment surface immersed in the material shall be guaranteed with strong corrosion resistance to prevent equipment corrosion or damage caused by long-term contact with special substances. In this case, stainless steel can be selected to reduce the future maintenance process. What should be paid attention to here is to prevent electrical corrosion caused by metal base with very close potential. The best way is to use rubber and other insulating materials to isolate the corrosion source.
Painting standard for portal crane: the steel surface of the main components of the steel structure shall be shot blasted, and the important components shall reach Grade Sa2.5 in GB8923. After shot blasting, paint, the primer is coated with epoxy zinc rich primer, the intermediate paint is coated with two coats of epoxy antirust primer, and the finish paint is coated with two coats of paint. Requirements: the surface of the finish coat shall be uniform, fine, bright and consistent in color.
