zinc anodes

Zimar Shaft Zinc Anodes - Standard

Zimar shaft zinc anodes meet the standards set for...

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Zimar Shaft Zinc Anodes - Standard
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Zimar shaft zinc anodes meet the standards set forth by Mil-Spec A-18001K, Mil-Spec A-18001A, and Mil-Spec A-18001. All Zimar shaft zinc anodes include copper contacts for permanent ground and stainless screws with washer retainers. Zimar Shaft Zincs weigh more than the competition, and peform their cathodic protection job better. There is a r... Prices Starting At: $6.94

Zimar Shaft Zinc Anodes - Metric

Zimar shaft zincs meet the standards set forth by ...

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Zimar Shaft Zinc Anodes - Metric
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Zimar shaft zincs meet the standards set forth by Mil-Spec A-18001K, Mil-Spec A-18001A, and Mil-Spec A-18001. All Zimar metric shaft zinc anodes include copper contacts for permanent ground and stainless screws with washer retainers. Zimar metric shaft zincs weigh more than the competition, and peform their cathodic protection job better. Prices Starting At: $8.12

Zimar Single Bolt Clamp Rudder Zincs

Zimar rudder zincs meet the standards set forth by...

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Zimar Single Bolt Clamp Rudder Zincs
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Zimar rudder zincs meet the standards set forth by Mil-Spec A-18001K, Mil-Spec A-18001A, and Mil-Spec A-18001. All Zimar rudder zinc anodes include copper contacts for permanent ground and a stainless screw. Zimar Rudder Zincs weigh more than the competition, and peform their cathodic protection job better. Most discerning boat owners choose Zima... Prices Starting At: $5.68

Zimar Bolt on (drilled) Plate Zincs

All Zimar plate zinc anodes are cut as per dimensi...

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Zimar Bolt on (drilled) Plate Zincs
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All Zimar plate zinc anodes are cut as per dimensions with specified bolt patterns. These Zimar plate zincs are pre-drilled for bolt-on attachment. Zimar plate zincs meet the standards set forth by Mil-Spec A-18001K, Mil-Spec A-18001A, and Mil-Spec A-18001 Zimar Plate Zincs weigh more than the competition, and peform their cathodic protection jo... Prices Starting At: $8.52

Zimar Bolt on (undrilled) Plate Zincs

All Zimar plate zinc anodes are cut as per dimensi...

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Zimar Bolt on (undrilled) Plate Zincs
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All Zimar plate zinc anodes are cut as per dimensions. Zincs are undrilled to allow for consumer to drill specific patterns for fastening. Zimar plate zincs meet the standards set forth by Mil-Spec A-18001K, Mil-Spec A-18001A, and Mil-Spec A-18001. Zimar Plate Zincs weigh more than the competition, and peform their cathodic protection job better.... Prices Starting At: $5.55

Zimar Weld on Plate Zinc Anodes

All Zimar plate zinc anodes are cut as per dimensi...

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Zimar Weld on Plate Zinc Anodes
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All Zimar plate zinc anodes are cut as per dimensions with galvanized steel mounting strips for easy welding or drilling. Zimar plate zincs meet the standards set forth by Mil-Spec A-18001K, Mil-Spec A-18001A, and Mil-Spec A-18001. Zimar Plate Zincs weigh more than the competition, and peform their cathodic protection job better. Prices Starting At: $17.44

Zimar Bolt on Round Plate Zincs

All round plate Zimar zinc anodes are cast with bo...

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Zimar Bolt on Round Plate Zincs
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All round plate Zimar zinc anodes are cast with bolt hole predrilled on center for easy mounting on hull. Zimar round plate zincs meet the standards set forth by Mil-Spec A-18001K, Mil-Spec A-18001A, and Mil-Spec A-18001. Zimar Round Plate Zinc Anodes weigh more than the competition, and peform their cathodic protection job better. Prices Starting At: $9.71

Zimar Prop and Bow Thruster Nut Zincs

These Zimar nut zinc anodes are precision machined...

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Zimar Prop and Bow Thruster Nut Zincs
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These Zimar nut zinc anodes are precision machined to fit over specific nut configurations and models. Zimar zinc anodes are individually made to assure highest possible zinc concentration and lowest amount of porosity in the zinc market. Zimar nut zincs meet the standards set forth by Mil-Spec A-18001K, Mil-Spec A-18001A, and Mil-Spec A-18001. ... Prices Starting At: $11.99

For boat owners around the globe, Deep Blue Yacht Supply is your trusted source for the best zinc anodes in the marine industry. We are committed to providing the best zinc anodes, at the lowest prices, with superior customer service.

Zimar Zinc Anodes set the standard when it comes to cathodic protection. Zimar Zinc Anodes meet all standards set forth by Mil-Spec A-18001K, Mil-Spec A-18001A, and Mil-Spec A-18001. Zimar Zincs are individually hand poured to assure the highest possible zinc concentration and lowest amount of porosity.

Trust Deep Blue Yacht Supply to help equip your boat with the best possible zinc anodes. Deep Blue Yacht Supply is able to provide the ultimate sales and service experience, when it comes to selecting the best zinc anodes to protect your investment against corrosion. Deep Blue Yacht Supply has a huge inventory of the best Shaft Zincs, Plate Zincs, Rudder Zincs, Nut Zincs, etc.

Seawater is inherently corrosive and this is even more pronounced in the case of components that are made of two different metals. Any time two metals are in contact in seawater they will form a battery and one of the two metals will give up its electrons to create the current that flows between the two metals. This process is known as galvanic corrosion and unless you want your boat to begin failing you it is important that we halt this process before it begins. This is done by using a third metal which will more readily give up electrons to create a current. In boating, zinc is most commonly used and the zinc pieces are called zinc anodes, or more commonly just zincs.

Zinc anodes are used on boats anywhere two metals come in contact with each other and are thus subject to galvanic corrosion. This is most common with a stainless steel shaft and aluminum propeller, but there are many other places where two different metals come in contact on a boat. Without the protection of a zinc anode you risk corrosion seriously affecting your parts and components.

Some people think that as long as zinc is present it will protect the other metals on their boats, however they soon learn to their chagrin that this is not true. You can not protect your metal components by simply hanging a piece of zinc over the side of the boat, the zinc anodes must be in contact with the metals they are protecting. This isn't a big deal though as boat and engine manufactures have designed parts to allow for the inclusion of zinc anodes, from the zinc collar that goes around your shaft to the zinc hull plates that are used to protect bronze through-hull fittings to the various zincs in an engine there is typically a protection wherever there are two metals with the possibility of galvanic corrosion occurring.

Now that you know about the importance of zinc anodes it should also be stressed that these anodes do not last forever. Because they are sacrificing themselves to protect your more important metal parts they corrode themselves and are slowly worn down. As a rule of thumb the zinc anodes should be roughly 1% of the surface area they are protecting and should only need to be replaced annually. To be safe though you should inspect all your metal parts regularly for signs of corrosion and if any is present replace your zincs immediately. Typically zincs are replaced when they are only half consumed. Once they go beyond this they are significantly less effective and you risk damage to the parts you are trying to protect.

The good news is that zinc anodes are not expensive, many cost just several dollars and even larger hull plates can be had for under $30 in many cases. When installing zinc anodes be sure that they are in contact with the metal being protected, do not paint the surface of the zinc and make sure that both the zinc and other metal surface are bare and bright before installing the anode. In the case of your engine you should refer to the owner’s manual to be sure you know the location of all the zincs, some can be difficult to locate if you aren't aware that they are there.

It is good that there is a way to protect your metal parts, but the protection only lasts as long as you keep your zinc anodes bigger than half depleted. Make it a habit to check for corrosion regularly and replace those zincs when they are half depleted.

What are zinc anodes?

Zinc anodes are, at their core, a protective device for most boaters. When two metals meet, there is always a possibility of galvanic corrosion. This can be incredibly damaging for those that own boats, especially when they have any sort of metal that is actually submerged underwater. Fortunately, the addition of zinc anodes can actually help to prevent the process, which can save most boaters quite a bit of time and money. However, the use of such anodes does not merely have to be limited to boats; they can be used in any situation where metal meets sea water. It is first important, though, to understand the damaging occurrence of corrosion.

When two metals touch or are connected by electricity in sea water, a sort of rudimentary battery is formed. A current will form between the two metals, with a stream of ions going from one to another. During this process, some of the ions will be lost to the seawater. This means that bit by bit, the metal materials will actually be lost to the sea. This process is known as galvanic corrosion, and it can eventually lead to major damage to any part of the boat that is made of metal.

This process can be stopped, though, by the introduction of a third metal – in this case, the zinc anode. These anodes are used in a sacrificial manner – the zinc is given up to the sea, thus protecting the more important metal that is used for the operation of the boat. These anodes do not last forever, of course, but they do last for quite some time. As such, most boaters will take care to make sure that they make adequate use of their “zincs”, and thus can worry less about the basic hardware of their boats.

If you plan on taking your boat into the sea, you should consider making sure that you have zinc anodes to save your more important hardware. Always make sure that your zinc anodes are properly mounted, and make sure that they are used in such a way that they actually fulfill their purpose. This can usually be done by following simply instructions, but it is vitally important that these instructions are followed to the letter. Improperly mounted zinc anodes are rather useless, and constitute both a waste of material as well as a waste of money. Using the product correctly, though, can extend the life of your boat.

The Need for Zinc Anodes

Boat zincs are an important part of a marine craft propulsion system because they keep other metals from corroding and deteriorating in the water.  What is not thoroughly understood by some boaters, however, is the fact that zinc anodes cannot do this vital function unless they are left in their original state.

This means that boating enthusiasts need to keep the boat zinc free of paint.  A surface layer of paint will smother the zinc’s ability to sacrifice electrons so that the other metals nearby need not do so.  This sacrifice of electrons leads to eventual corrosion.  Therefore, boaters should keep their boat zincs in original condition, watching them closely so that they can be replaced when they have worn away and a new zinc anode becomes necessary.

Not just for propulsion

Boat zincs are useful for protecting other metals.  When it comes to boats, this means that their usefulness extends far beyond the propeller area.  To be sure, propellers are typically guarded against corrosion by the presence of a zinc collar around the shaft, but metal rudders are also at risk of corrosion.  The typical boat zinc in this situation is a disk that is bolted onto a metal portion of the propeller.  Lest the addition of boat zinc create turbulence or drag, zinc anodes for use on rudders usually have a shallow shape that is slightly domed.  This helps them to present a streamlined profile when attached to a rudder so that boat performance can remain high.

Understanding Zinc Anodes

Most boaters know about the importance of zinc anodes.  Zincs, as they are called, protect the metals of a boat from galvanic corrosion. However, many boat owners are somewhat unaware that steps must be taken to make sure that their zincs actually work towards their intended purpose. If you want to make use of sacrificial zincs on your boat, you must make sure that the zincs are actually connected to the relevant metals and that the zincs are uncovered and able to be exposed to the sea water. Doing so is the only way that these items will provide the necessary protection.

Your first step towards making sure that your zinc anodes are in working order is to make sure that they are actually in contact with the metal that needs to be protected. There are some individuals that think that, somehow, the zinc will act as a magnet for the corrosive elements of the sea water. In truth, though, the zinc must be in some kind of contact with the metal it is meant to protect. This means that you must either make sure that the zinc is making direct contact, or is somehow wired to the appropriate metal area. If this is done, the zinc anodes will properly work in a sacrificial manner.

You must also make sure that the zinc anodes are properly exposed for them to work. The entire purpose of the zinc in the zinc anodes is to be sacrificed, and covering up the metal can make the process work poorly, or not at all. As such, you must never paint the zincs on your boat. It is does not matter if you consider the metal to be an eyesore or if you want to maintain a uniformity of color – if the zincs are in any way covered, they will be smothered and thus rendered worthless.

If you want to make sure that your zinc anodes function correctly, it is important to take the time to really understand how they work. Once you do, you will realized that they must be both exposed to the sea water and in contact with the metals that they are meant to protect. This may mean a bit of extra work for you as a boat owner, but it will save you quite a bit on repair costs down the road. After all, the work put into these zincs will save you from more work on more important parts.

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