摘要
在汽车上市两年后的质检中发现,其车架焊道发生腐蚀。腐蚀的原因是焊接过程中产生了Fe、Si、Mn等氧化物,而该氧化物不导电,使其电泳时表面无电泳漆。对车架焊道防腐处理工艺的改进方案进行了讨论,确定了将保护气由单一的CO2改为80%Ar+20%CO2混合保护气的方案,并对恶劣环境使用的汽车采用底盘装甲的方案。改进后,焊道表面的氧化结晶体大幅度减少,防腐能力增强,产品质量优于同类合资品牌。
It was found that the vehicle frame weld bead was corroded during quality inspection after automobile listing for two years. The cause for corrosion was that non- conductive oxides of Fe, Si and Mn were produced during welding, leading to the absence of electrophoretic coatings on their surface. In the paper, the improvement scheme of corrosion protective treatment process of vehicle frame weld beat was discussed and ascertained as follows： replacement of single gas CO2 with mixed shielding gases （80% Ar ＋ 20% CO2） and use of armor for the chassis of automobile used in harsh environment. After improvement, the amount of oxide crystals on the surface of weld bead are decreased greatly, improving the corrosion protection performance. The products have better quality than the similar ones of joint venture brands.
出处
《电镀与涂饰》
CAS
CSCD
北大核心
2012年第8期40-42,共3页
Electroplating & Finishing
关键词
车架
焊道
防腐
保护气
底盘装甲
vehicle frame
weld bead
corrosion protection
shielding gas
armored chassis
