挂灰 meaning in English
sealing smut
Examples
- Aluminum products with shing uniform surface was prepared by electrochemical graining process , including alkaline cleaning , 1 % naoh etching , electrochemical roughing in hcl , naoh treating and anodizing in 5 % h2so4 etc
摘要研究了铝材无挂灰电化学砂化处理工艺。以盐酸作为电解液的主成分，控制合适的电流密度和电解时间等工艺参数，通过6步处理，得到砂化均匀、粗糙度适中及光亮的砂面。