Solvent Free High Tensile Epoxy Coating (XDC)

Detailed introduction to Solvent Free High Tensile Epoxy Coating (XDC):

Solvent Free High Tensile Epoxy Coating (XDC)
I Description of the Product Structure
 Solvent Free High Tensile Epoxy Coating employs the modified epoxy as the major film forming material, the reactive diluent flexibilizer to realize solventliss, so as to reinforce the cohesion, chemical stability and mechanical property of the coat.
II Performance
 Employment of the scaly filling can not only promote the mechanical property of the coat but also produce coat shielding effect and anticorrosion effect.
 The matching firming agent of XDC is of low viscosity, which makes the coating harder, tougher and more anticorrosive and compact after it is solidified. The service life and solidifying period are also appropriate.
 In addition to bearing the property of solvent epoxy coating such as fine insulatibity ,super chemical stability , the coating has been highly promoted in cohesion, toughness, impact strength and peeling resistance strength .In the coating process, the dissolvent will not be vaporized , and the pinholes are avoidable. One filming can reach 200μ m above. As a result the coating can help greatly in saving energy and protecting the environment.
III Application
 Since XDC excels in strength solid content, corrosion resistivety, simple coating procedure and environment protection, it is used extensively in major anti-corrosion places such as the city piping conservation, anti-corrosion construction inside and outside of underground piping, joint, connector bend, anticorrosion and large-scale repairing of the underground pipe.
IV XDC Performance Index
Serial No.  Test items  Unit Technical Criteria voluntary standards
1  Adhesion Stage ≤ 2  GB/T1720
2  Flexibility ㎜  ≤ 1  GB/T1731
3  Impact J  ≥ 4.9  GB/T1732
4  Hardness  ≥ 0.60  GB/T1730
5  Surface Hardness h  ≤ 2  GB/T1728
6  Internal Hardness H  ≤ 16  GB/T1728
7  Fineness μ m  ≤ 80  GB/T1724
8  Appearance  Of all  color, clean and smooth  GB/T1729
9  Solids Content %  ≥ 95  GB/T1725
10  Boiling Water Resistance 24h  pass SY/T0447 Appendix E
11  Chemical Soaking Tolerance 10 % H 2 SO 4  72h  Unchanged GB/T1763
  10 % NaOH  72h  Unchanged 
  3 % NaCl  72h  Unchanged 
12  Adhesion Stage  ≤ 2  SY/T0315 Appendix B
13  Cathodic Disbonding ㎜  ≤ 10  SY/T0315 Appendix C
14  Impact Strength J  ≥ 12  Q/CD151
15  Counter Bending 3.0 o  Coat unchanged Q/CD151
16  Coat Shear Strength  Mpa  ≥ 15  SY/T0041
17  Electrical Breakdown Strength MV/m  ≥ 25  GB/T1408
18  Volume Resistivity  Ω .m  ≥ 1×10 GB/T1410
V Coating
 Surface Treatment: Treat the surface according to GB8923 until it reaches Sa2.5, then clear the dust on the steel tube surface.
 Coating Processing: TL-3 XDC is a kind of combined coating of Group A and Group B, and should be mixed according to certain proportion (A:B=100:20-25 which is adjustable according to the real environmental temperature) and complete the coating according to the prescribed time. In the process, brush coating, roller coating, doctor coating and bicomponent airless spray coater can be employed. The proper depth of the steel tube surface anchor stripe is desired to be 50-70μ m.
VI Coating Testing
 Test should be carried out on the appearance, thickness, leak and adhesiveness of the anti corrosive coating. The surface is supposed to look like lacquer film, clean and sleek. The thickness should be tested with nondestructive thickness gage and leak detection checked with electric spark pinhole detection instrument under leaking detection voltage of 2000V. If the coating fails to pass thickness and leak test, further coating is demanded. And the adhesiveness should be tested according to epoxy coal tar coating standard.