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Q: How secure is your web site for online purchases? Will my credit card information be safe?
A: Our e-commerce site is implemented on Yahoo! owned and operated computer systems. Over the past ten years, Yahoo! has
become the Internet's leading on-line business services company. Your credit card information
is sent encrypted to their computers from your browser via HTTPS. After your order is processed, no credit card information is retained by either Yahoo! or BoatZincs.com.
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Q: How are your prices so low?
A: You’re probably wondering “How can you charge so much less?” than other marine product stores and still be in business, right?
First of all, we only sell boat anodes. We specialize in the distribution of just one type
of marine product and don’t sell anything else, period. We know boat anodes A to Z.
This product knowledge makes us very customer-responsive and cost-efficient.
Need an anchor for your boat? Well, go back to Google.
Second, we buy tons of boat anodes. They arrive at our shipping dock transported
on tractor trailer trucks dispatched from the foundries. We use our volume
purchasing power to get you the lowest possible prices.
And, third, we run a tight ship. We spend our marketing budget carefully to ensure
every advertising dollar pays for itself. We streamline our order processing system
by asking you to enter your own order (thanks!). And we don't waste money on
unnecessary things like mailing out product catalogues.
The result... We're proud to tell you we're a small but profitable company that
expects to be in business for many years to come. This is due to having value-
conscious customers like you.
We’re passionate about our boat anode business and we hope it shows.
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Q: Many e-commerce stores are eager to take orders but then can't deliver. Are your products stocked and shipped from your own physical inventory?
A: Yes, we are a real 'store' in the literal sense. We maintain an extensive physical inventory of every product we sell (except Commercial Anodes which ship direct from our foundries) so that we can ship immediately to you. Should we run out of a particular item, we immediately list it on our Inventory page. If you have any questions or concerns about our ability to ship and/or deliver your order, call us at 978-841-9978.
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Q: When will my order ship?
A: It is our policy to ship every order complete within 24 hours of its receipt. Orders placed before 4:00 PM ET ship that day.
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Q: One of the products I need is listed on your Inventory page as temporarily unavailable. Will it hold up the rest of my order?
A: By default, we ship all orders complete. If you require a partial shipment, let us know.
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Q: Which do you recommend: UPS Ground or USPS Priority Mail?
A: United Parcel Service (UPS) specializes in the reliable delivery of packages like ours. Late 2004, the United States Postal Service (USPS) introduced a package delivery service called ‘Priority Mail Flat Rate Box’ that many of our customers find attractive.
As to which carrier to use – it’s your choice, not ours (unless of course you place an order over $100 with free shipping - then we ship the fastest and most economical way). During checkout, you can compare the shipping fees. Here are the pros and cons of each service as we see them:
UPS Ground
+ Long history of reliable package deliveries 
+ Often less expensive for orders going less than 1,000 miles
+ Often less expensive for orders over $100.00
+ Late-day ordering (pick-up at 5:00 PM ET)
+ Online tracking of packages at www.ups.com
– No Saturday deliveries (M-F only)
- No PO Box deliveries
USPS Priority Mail Flat Rate Box
+ Often less expensive for orders under $100.00 and going over 1,000 miles
+ Often faster delivery for orders going over 2,000 miles
– New parcel service implemented by letter carriers
– Restrictive packaging -- only two different box sizes permitted
– Harder to track package until it is delivered
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Q: I’m in a hurry. Can I pick-up my order?
A: Yes. Select "Customer Pickup” on your order as the shipping method and tell us when you need it. We’ll have it waiting for you at 365 Boston Post Road (Route-20), Sudbury, MA.
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Q: Can I call to place an order?
A: Yes, please call anytime! We take many, many telephone orders and can be reached at 978-841-9978.
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TECHNICAL
Q: Do all your products meet Mil-Spec?
A: Yes! Sacrificial anodes must be impurity-free to properly work so all our anodes are made only from Mil-Spec alloys. Click here to learn more about the importance of Mil-Spec A-18001K for corrosion protection of your boat. Our Aluminum anodes conform to Mil-Spec A-24779(SH) and ASTM B418 Type 1, and our Magnesium anodes conform to Mil-Spec A-21412(SH).
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Q: How much zinc do I need on my boat?
A: There are two dimensions to this topic.
First, the larger the surface area of an anode, the higher its electrical current capacity and galvanic holding voltage. For most boats, you want your anode surface area to be sufficient to maintain all underwater metals between -900 mV and -1100 mV relative to a silver/silver-chloride
reference electrode.
Second, the longevity of a sacrificial anode is a function of its
weight -- the greater the weight the longer its life.
Due to differences in water salinity,
temperature, stray currents, and other external influences, you only know the right
weight by actual trial. Periodically inspect your zincs and when they have corroded to
under 50% their original weight they should be replaced. To lengthen the
replacement interval, increase the weight of zincs used.
If you have a steel or aluminum hull vessel, use our Calculation Formula.
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Q: How can I tell if I have too little (or too much) corrosion protection on my boat?
A: The best way is to measure it. With a silver/silver chloride reference electrode it
is relatively easy to get highly accurate voltage readings from all your underwater
metals and determine if they are corroding or not. Learn more here.
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Q: The installation of boat anodes looks pretty straightforward. Could I be overlooking anything?
A: Make sure your anodes have good physical and electrical connections. An anode with a poor electrical connection cannot provide corrosion protection. Clean the area where you anode will be mounted by lightly sanding or wire brushing. Also, do not paint your anodes as they cannot perform unless exposed to water. Covering
anodes with bottom paint renders them useless.
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Q: What are the technical differences between zinc, aluminum and magnesium anodes?
A: The intrinsic characteristics of the three different anode metal alloys used in the
marine environment are listed below:
Anode Alloy |
Voltage(1) |
Density |
Energy
Capacity |
Relative Life
to Zinc |
Zinc
(Mil-A-18001K) |
-1050mV |
0.258 lbs/in3 |
368 A-h/lb |
100% |
Aluminum
(Mil-A-24779SH) |
-1100mV |
0.105 lbs/in3 |
1108 A-h/lb |
120% |
Magnesium
(Mil-A-21412) |
-1600 mV |
0.063 lbs/in3 |
500 A-h/lb |
25% |
(1) Galvanic voltage produced relative to a silver/silver-chloride electrode in salt water
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Q: Which anodes should I use: Zinc, Aluminum or Magnesium?
A: Your choice of anodes requires consideration of three issues:
- The kinds of underwater metals on your boat (e.g., stainless steel, bronze,
aluminum, mild steel);
- The kinds of water you operate your boat in (e.g., salt, brackish and/or
fresh); and,
- If your boat can galvanically couple to other boats around it (i.e., connected
to AC shorepower without a galvanic isolator).
For vessels with AC shorepower connections and no galvanic isolation, use Chart A (pdf). For vessels with no AC shorepower connections, or AC shorepower
connections with galvanic isolation, use Chart B (pdf).
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Q: What is “bonding”?
A: The purpose of a bonding system is to ensure that metals on your boat are at the
same voltage potential. This provides two major benefits:
- electrical safety for the above water metals, and
- corrosion protection for the underwater metals.
When bonded, underwater metals cannot be damaged by stray electrical currents
originating from within the boat (e.g., a defective bilge pump, float switch or wire
splice). When the bonding system is then connected to sacrificial anodes, all bonded
underwater metals are protected against galvanic corrosion.
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Q: How can I check my bonding system?
A: When your boat is on dry land, it’s simple. Use a digital ohmmeter with very long
leads. Connect one lead to any ‘underwater’ metal in your bonding system (e.g, hull
zinc anode). Then successively connect the other lead to each and every other
underwater metal connected to your bonding system and verify a reading of 1 ohm or
less (ideally a perfect circuit near 0.01 ohm.) Do not include the resistance of the
ohmmeter leads themselves.
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