Description
Performance
index:
1、Thickness: thickness of coating
8～*2μm,Thickness with top-coating
****5μm;
2、No production of hydrogen
embrittlement: Acid washing is not needed for coating
pre-processing;
3、Free from bimetallic corrosion
threat: Aluminum eliminates Zn-Al or Zn-steel bimetallic corrosion
that occurs frequently in zinc coating;
4、Solvent resistance: the inorganic
coating features excellent solvent resistance;
5、Heat resistance: the coating
keeps excellent corrosion resistance after three hours heat
sensitization at **0℃;
6、Electric conductivity: with a
large number of metal flakes, the coating is
conductive;
7、Corrosion resistance: for thread
parts, water-based chromium-free Zn-Al coating of thickness ***0μm
can endure a salt spray test for **0 hours, without red rust; while
for non-thread fasteners, its over ***0 hours
8、Adhesion
performance:≥8Mpa
9、Scratch and Hardness: it is
superior to performance of the Zn-Cr coating, and hardness of the
coating surface is surpasses 8H.
*0、Friendly environmental
performance: without any form of chromium (such as trivalent and
hexavalent chromium etc)
*1、Different colours to meet
different requirements
