表面技术2017，Vol.46Issue(2)：199-203,5.DOI:10.16490/j.cnki.issn.1001-3660.2017.02.033
电镀锌三价铬彩色钝化膜封闭剂的制备
Preparation of Cr Ⅲ-based Iridescent Passivation Flim Sealant on Zinc Coatings
禚昌岩1
作者信息
- 1. 徐州高新区淮海科技创新研究院,江苏 徐州 221116
- 折叠
摘要
Abstract
The work aims to improve corrosion resistance of Cr III-based iridescent passivation film on zinc coatings by preparing a fine sealant. Principal raw materials of sealing agent were as follows: NaF, Na2SiO3 and OP. The corrosion resis-tance of Cr III-based iridescent passivation film subject to sealing treatment was studied by 5% lead acetate drop method. For-mulation of the sealant was discussed; effects of such process conditions as sealing time, process conditions baking temperature and baking time on corrosion resistance were analyzed; the sealing process was optimized by performing an orthogonal test, so as to determine passivation process specification for sealants with NaF and Na2SiO3 as main salts. The sealant composition ob-tained was: NaF of 0.2 mol/L, Na2SiO3 of 0.05 mol/L and OP of 1 mL/L. The duration of lead acetate drop experiment might amount to 900 s provided with NaF of 0.2 mol/L, Na2SiO3 of 0.05 mol/L, immersion time of 20 min and baking temperature of 80℃. After being sealed, the film is iridescent and bright, and is provided with better corrosion resistance.关键词
封闭剂/三价铬钝化/电镀锌/氟化钠/硅酸钠Key words
trivalent chromium passivation/electrogalvanizing/NaF/Na2SiO3分类
化学化工引用本文复制引用
禚昌岩..电镀锌三价铬彩色钝化膜封闭剂的制备[J].表面技术,2017,46(2):199-203,5.
