This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
A Qualitative and Quantitative Evaluation of Zn+Cr-CrO x Multilayer Coating Compared to Other Coated Steel Sheets
Annotation ability available
Sector:
Language:
English
Abstract
A study has been made of corrosion resistance and material processability of Zn+Cr-CrOx (ZCC) compared with electrogalvanized (E2) and Zn-Ni (ZN) or Zn-Fe (ZF) coated sheets. It has been found that ZCC and ZN have better perforating corrosion than ZF and EZ. Cosmetic corrosion resistance of the three alloy coatings is almost the same; ZCC is slightly better also after deformation; EZ has the worst behavior. All the coated products take the phosphate coating except for ZCC which is inert to phosphating baths. Its paint adhesion is ensured by the CC top layer. In painting ZCC has the least tendency to cratering due to the presence of metallic chromium on its surface. In spot weld-ability the special coatings require electrode dressing and replacing 3-4 times less frequently than EZ. An economic study has also been made based on the N. Italsider electrogalvanizing line showing that production of ZCC is clearly more profitable than EZ, ZN and ZF.
Authors
Citation
Memmi, M., Ferrari, V., Arrigoni, G., Sarracino, M. et al., "A Qualitative and Quantitative Evaluation of Zn+Cr-CrOx Multilayer Coating Compared to Other Coated Steel Sheets," SAE Technical Paper 862028, 1986, https://doi.org/10.4271/862028.Also In
References
- Mathias F. Chapman T.W. “Fundamental aspects of alloy electrodeposition” 4th AES Continuous Strip Plating Symposium May 1-4 1984 Chicago
- Johnson W.R. Pfister L.E. “High speed continuous strip plating of zinc alloys”
- Fountoulakis S.G. Steinbicker R.N. Fisher T.W. “Zinc alloy electroplated sheet steel-effect of process parameters on plating efficiency and composition”
- Weymeersch A. Renard L. “High-current density electro-plating of Zn-Ni and Zn-Fe alloys”
- Kamoda A. Matsuda A. Yoshihara T. Kimura H. “Zn-Ni alloy plating at high current densities”
- Noumi R. Yanagawa K. Hoboh Y. Nagasaki H. Kurimoto T. “New developments in the production of Ni-Zn alloy plated steel sheet SZ”
- Irie TI. Kyono L. Kimura H. Honjo T. Yamato K. Yoshihara T. Matsuda A. “Development of Zn-Fe alloy electroplating with soluble anode in a chloride bath”
- Andaniya T. “Iron-zinc alloy electroplating on strip”
- Memmi M. Bruno R. Palladino M. “Cr-CrO x electrodeposition for corrosion Performance improvement of electrogalvanized steel sheet in automotive application” Material Performance 22 2 1983
- Arrigoni G. Sarracino M. “Effects of press-forming deformation on the corrosion resistance of precoated steel sheets for the automotive industry” International IDDRG Congress Amsterdam May 23-24 1985
- Toda M. Kojima H. Morishita T. Kanamura T. Arai K. “Development of two-layered Zn-Fe alloy electroplated steel sheet-new coated steel sheet for automotive body” SAE Paper n. 840212 Detroit February 27 March 2 1984
- Sudoo C. Hayashi Y. Nishihara M. “Behaviour of coated film in pressforming of surface trated steel sheet” Le Memoires Scientifiques de La- Revue de Metallurgie March 1980
- Johnson W.R. Vrable J.B. “Corrosion resistance and paintability of Zinc and Zinc-Alloy Coatings for Automotive Sheet” SAE Paper n° 840213 Detroit Feb. 27 March 2 1984
- Fountoulakis S.G. “Perforation Resistance of Precoated Steels in an Accelerated Automotive Test” SAE Paper no. 860270 Detroit February 1986
- Walter G.W. “Application of impedance measurements to study performance of painted metals in aggressive solutions” J. Electroanal. Chem. 118 1981 259 273
- Schoff C.K. Chen H.J. “Cationic Electrodeposition Primers over Zinc Coated steels. Part 1: Effect of voltage and Substrates on Coating Quality” Jocca 8 1985 185 190
- “Corrosion Resistant Steel Sheets for Automobiles” Nippon Kokan Technical Report 1985