Hadi Spine Casting vs Gravity Casting: Why Tubular Spines Don’t Corrode

August 26, 2026 • Mizuki Technical Bureau • 5 Min Read

The positive grid is the backbone of any lead-acid battery. Traditional gravity casting often traps microscopic air bubbles and voids inside the lead spines. Under constant acid exposure and charging voltages, these voids turn into weak points where anodic corrosion eats through the spine, causing catastrophic battery failure. At Mizuki Power, our automated pressure casting machines inject molten lead under 100-bar hydraulic pressure, achieving pristine grain boundary alignment.

Mizuki Technical Engineering Bureau

Authored by our research electrochemists and quality engineering directors based at the Chakan R&D and Purnea manufacturing complexes.

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