Ntxiv nrog rau kev xaim ntawm lub substrate, cov hlau txheej yog qhov chaw ntawm cov xov hlau substrate yog welded rau cov khoom siv hluav taws xob. Tsis tas li ntawd, cov hlau sib txawv kuj muaj qhov sib txawv.
tus nqi, qhov sib txawv yuav cuam tshuam ncaj qha rau tus nqi ntawm kev tsim khoom; Cov hlau sib txawv kuj muaj qhov sib txawv weldability, kev sib cuag, thiab cov nqi tiv thaiv, uas yuav cuam tshuam ncaj qha rau kev ua haujlwm ntawm cov khoom.

Common hlau coatings yog:
tooj liab
Tin

Lub thickness yog feem ntau ntawm 5 thiab 15 cm Lead-tin alloy (los yog tin-tooj ​​liab alloy).
Ntawd yog, solder, feem ntau yog 5 mus rau 25 m tuab, nrog cov ntsiab lus tin ntawm 63%.

kub ; Feem ntau yuav tsuas yog plated ntawm lub interface.

nyiaj; Feem ntau yuav tsuas yog plated ntawm lub interface, los yog tag nrho kuj yog ib tug alloy ntawm nyiaj.