ເຕັກໂນໂລຊີການປິ່ນປົວດ້ານທໍ່ສະແຕນເລດ
I.Chemical code for metal surface treatment1.1.Pickling: The Art of Corrosion and RebirthProcess essence: using 15%-20% nitric acid and 3%-5% hydrofluoric acid mix solution, at 50-60 ℃ for 3-20 minutes of immersion, to remove 0.01-0.03mm surface metal producer-Germanyp layer of metal case-A.