Bolt Zinc
July 27th, 2009
Does cathodic protection work for cars?
Steel boat holes are protected by bolting a zinc sacrificial anode to them. The zinc corrodes instead of the steel hull, which acquires a protective negative charge. Offshore oil platforms are protected in a similar way; a DC generator producing about a kilowatt is connected to an inert anode a short distance from the platform underwater, and the negative terminal is connected to the platform, protecting it from corrosion. We live on the coast, where cars corrode very quickly. I’ve bolted a piece of zinc to our car. Is there any reason why this won’t work? Why doesn’t everybody do it?
I don’t believe this will work, as I have heard of some that have tried. The problem I believe is that cathodic protection works best when the metal is totally immersed in the water. And even then, the water needs to be of a high salt content in order to conduct enough electricity to make cp work. I don’t believe your vehicle would have enough moisture and would dry out from time to time ruining the effect and would also not have enough salt content for the required conductivity.
Also, not sure how this all plays into it, but generally the DC power sources that are used at very low voltage, like less than 1 volt.
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Zinc Finish 4mm Bolt Size 4.3mm ID 9mm OD Metric Flatwashers – 50 Pack $0.99 |
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Zinc Finish Spring Steel 4mm Bolt Size 4.1mm ID 7.4mm OD Metric Lock – 50 Pack $0.99 |
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Zinc Finish Spring Steel 5mm Bolt Size 5.1mm ID 9.0mm OD Metric Lock – 50 Pack $0.99 |
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National 3/16 By 1 1/2 Inch Zinc Eye Bolt $0.99 |
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10 HEAVY DUTY 3/16 SPRING WING TOGGLE BOLTS~SCREW~FASTENER~ANCHOR~BUTTERFLY~NAIL $0.99 |
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10 ONE WAY ANTI VANDAL SECURITY BOLT SCREWS~SAFETY WINDOW CHILD GUARD~GATE~ALARM $0.99 |
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Stanley Heavy Duty 4″ Barrel Bolt 76-3760 Zinc $0.99 |
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1/4″-20 x 1-3/4″ Zinc Finish ASTM A307 Grade A Round Head Carriage Bolt $1.00 |
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1/4″-20 x 1-1/4″ Zinc Finish ASTM A307 Grade A Round Head Carriage Bolt $1.00 |
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Qty. of 5 – 1/4″-20 x 5″ Zinc Finish Grade A Round Head Carriage Bolt $1.00 |
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1/4″-20 x 2-3/4″ Zinc Finish ASTM A307 Grade A Round Head Carriage Bolt $1.00 |
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JUBILEE Zinc Plated Mini Nut & Bolt Clips – 18mm / 20mm $1.58 |
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JUBILEE Zinc Plated Mini Nut & Bolt Clips – 8mm / 10mm $1.58 |
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JUBILEE Zinc Plated Mini Nut & Bolt Clips – 9mm / 11mm $1.58 |
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1 x JUBILEE Zinc Plated Mini Nut & Bolt Clips 13mm/15mm $1.58 |
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SILICONE HOSE Heavy Duty Hose T Bolt Clamps Clips – Turbo Pipe Intercooler $1.88 |
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SILICONE HOSE Heavy Duty Hose T Bolt Clamps Clips – Turbo Pipe Intercooler $1.88 |
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SILICONE HOSE Heavy Duty Hose T Bolt Clamps Clips – Turbo Pipe Intercooler $1.88 |
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SILICONE HOSE Heavy Duty Hose T Bolt Clamps Clips – Turbo Pipe Intercooler $1.88 |
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SILICONE HOSE Heavy Duty Hose T Bolt Clamps Clips – Turbo Pipe Intercooler $1.88 |
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SILICONE HOSE Heavy Duty Hose T Bolt Clamps Clips – Turbo Pipe Intercooler $1.88 |
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SILICONE HOSE Heavy Duty Hose T Bolt Clamps Clips – Turbo Pipe Intercooler $1.88 |
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SILICONE HOSE Heavy Duty Hose T Bolt Clamps Clips – Turbo Pipe Intercooler $1.88 |
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SILICONE HOSE Heavy Duty Hose T Bolt Clamps Clips – Turbo Pipe Intercooler $1.88 |
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SILICONE HOSE Heavy Duty Hose T Bolt Clamps Clips – Turbo Pipe Intercooler $1.88 |
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