PURPOSE: To obtain a planted steel plate excellent in corrosion resistance, wet corrosion resistance and suitability to chemical conversion treatment, by immersing a steel plate in an Al base composite plating bath having a specific composition containing Zn and Si to which Mg, Mn, Cr and a Misch metal are added in a proper amount.
CONSTITUTION: One kind or more 0.01W1.0% Mg, 0.01W0.5% Mn, 0.01W0.5% Cr and 0.01W2.0% Misch metal are added to an Al base Al-Zn alloy bath containing 1W30% Zn and 1W12% Si and, according to necessity, 0.01W0.5% Sb is further added to form a hot dipping bath material. This hot dipping bath material is heated to about 620W670°C and, after a pretreated steel plate is immersed in the heated hot dipping bath to carry out plating, the adhered amount is controlled to pref., 30g/m2 (single surface) or less by a gas squeezing method to prepare a steel plate hot-dipped in an aluminum base composite excellent in corrosion resistance, heat resistance and wet corrosion resistance and good for chemical conversion treatment and processability.
KATAYAMA KIICHIROU
IDA FUMIHIRO
MITANI YORIMASA
MITSUYOSHI YASUSHI
| JPS58177450A | 1983-10-18 | |||
| JPS586965A | 1983-01-14 |
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