Process Sequence

Low-Carbon Steel. Lead can be plated directly on steel from the fluoborate bath using the following cycle:

• Degrease with solvent (optional)

• Dip in 10% fluoboric acid (Caution: Hydrochloric or sulfuric acid should not be used because they can precipitate insoluble lead sulfate or chloride on the work in the event of poor rinsing)

Lead can be plated on steel from fluosilicate and sulfamate baths using the following cycle:

• Degrease with solvent (optional)

• Dip in 5 to 25% hydrochloric acid

• Rinse thoroughly

• Dip in 30 to 75 g/L (4 to 10 oz/gal) sodium cyanide

• Copper cyanide strike

• Rinse thoroughly

• Dip in 10% fluoboric acid (see caution above)

Copper. Lead can be plated directly on copper from fluoborate, fluosilicate, or sulfamate baths using the following cycle:

• Alkali clean (anodic or cathodic/anodic)

• Dip in 10% fluoboric acid (see caution above)

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