Lifting brushing paint protection requirements

   1 protective Term definition: In single-girder  gantry crane  design protection period, the surface does not exceed the ISO4628-3 rust rust grades in Ri3 level (equivalent to ASTMD610 of six or European standards Re3 grade)

     2, A3.08, A3.11, A4.14, A4.15, etc. are ISO12944-5: 2007 Appendix Table A3 and A4 in the matching system number.

     3, single girder  overhead gantry crane  main consideration gloss finish selection and color retention, 4 files, PU412 aromatic polyurethane topcoat, PU413 aliphatic polyurethane topcoat, PU421 polyurethane finish construction machinery, PU420 polyurethane engineering automotive finish .

     4, no zinc primer (EPMisc.) consideration was mainly rust resistance and high solids, one can achieve a dry film thickness of 80 microns, optional epoxy zinc phosphate primer, epoxy bottom aluminum tripolyphosphate paint.

     5, zinc-rich primer required dry film (or non-volatile parts of) zinc content (not the metal zinc content) ≥ 80%. Such as the use of the level GB_T_6890-2000 zinc (metallic zinc content ≥ 96%), the dry film can be converted into (or non-volatile parts of) zinc content (not the metal zinc content) ≥ 76.80%. Can also be taken as inorganic zinc (zinc silicate) primer.

     6, the most commonly used in the paint is epoxy painted iron, because iron thin cloud is not high, such as requiring single girder gantry crane surface appearance, and can be replaced with a good degree of fineness in epoxy thick film painted.

     7, exported to Europe's single girder  bridge gantry crane  to be considered harmful heavy metal coatings (such as lead, chromium, etc.) content issues, zinc-rich primer should use high purity and low heavy metal content of zinc (as zinc ASTMD520 required) should not be used etc. leaded lead chrome yellow pigment.