reasons for poor solder terminal block where

Screw -type terminal requires a fixed by welding to the electrical wiring part in the operation , but this operation may be due to improper operation , or the material is not generated on the tin soldering phenomenon , the text for the poor solder terminals several common reasons for the order.
1 Terminal tin-lead plating solution contamination ;
(2) excessive gloss agents, resulting in excessive  WISDOM Displayport CABLE carbon content in the coating ;
3 after plating bad ( liquid remaining shuttle , poor water quality , salt production, foreign body attachment ) ;
4 adhesion bad ;
5 plating voltage is too high , causing thermal oxidation plating , passivation ;
6 current density is too high, caused by poor coating structure ;
7 terminals stir bad , bad cause the coating structure ;
8 bath temperature is too high, caused by poor coating structure ;
9 coating due to poor placement environment , time  WISDOM Terminal BLOCK is too long , causing the coating oxidation and aging ;
10 terminal coating is too thin ;
11 solder temperature is not correct ;
12 plating structure affects the shape ;
13 high flux of impurities ;
14 plating material impact on the ( tin > tin-lead > Gold > Cu > phosphor bronze > Ni > Brass ) ;
15 bath bad ;
16 organic impurities ;
17 foreign metal impurities ;
18 nickel layer passivation ;
19. Total Metal too .
Terminals using a common modular terminal blocks with  WISDOM Mini HDMI cable screw connection , screw connection is still the mainstream of industrial connection technology , terminals no other connection methods to get such a high pressing force in the smallest space.