Have you ever wondered where you can source quality aluminium anodes? If you have then look no further because BuyAluminiumAnodes.com is a web directory that can help you. We offer a guide to the very best manufacturers of Aluminium Sacrificial anodes within the UK.
This site is an extremely useful tool for purchasers and decision makers around the world because it provides them with accurate information collated from a team of experts whom have a wealth of experience from within Cathodic Protection. We only list manufacturers, up to date foundries that are ISO 9001:2000 approved and have undergone electro chemical testing carried out by DNV. We do not direct you the buyer to a middleman or the Anode Producer with suspect quality, this is not our remit and will therefore provide you with PEACE OF MIND before you make your decision to BUY.
BuyAluminiumAnodes.com is informative and provides technical information for the consumer whether they are a company buyer, or a boat owner, looking to purchase aluminium sacrificial anodes. Don’t be misled; Manufacturers will deal direct with the public at a trade counter via the internet. This will avoid Wholesales and Chandlery mark ups and guarantees the anode quality because you have full traceability to the source of your anode. From a company perspective it is always better to send larger enquiries to the supplier via the enquiry forms. They do get looked at and you will more than likely receive a substantial discount.
Cathodic Protection Suppliers
For both Public and Commercial Anode Sales
MCPS LTD Aluminium Anodes:http://www.mcpsltd.com/datasheet.php
Z-Guard Aluminium Anodes:http://www.z-guard.co.uk/aluminiumhullanodes.html
Members of the public should miss out the chandleries and go direct to Manufacturers shopping carts if they are available.
Buy Anodes Online
Buy Aluminium Anodes On-line. Click here or on Logo Below to Buy Aluminium Anodes Online at Z-Guard
What does Corrosion Cost ?
Natural disasters cost the U.S. economy $17 Billion a year while corrosion costs the U.S. $276 Billion a year. It is evident that all areas of industry do not put enough emphasis on corrosion control.
The Basic of Cathodic Protection
Cathodic Protection is the partial or complete protection of a metal from corrosion by making it a cathode, connecting either a galvanic anode or an impressed current anode. When cathodic protection is applied to a metal surface (cathode), the chemical reaction between the anode and cathode can form a scale or deposit which increases the electrical resistance and reduces the flow of current from the anode. Consequently, the current required to achieve cathodic protection initially is more than that required to maintain protection once polarisation has been achieved.
Design, installation, and testing of a cathodic protection shall be carried out under the direction of a ‘Competent Person’ in this field. The competent person shall have relevant qualifications from a recognised body such as the National Association of Corrosion Engineers (NACE), the Institute of Corrosion (ICorr), or equivalent.
Standard practice should be to utilise a specialist contractor, experienced in cathodic protection applications. If this is not possible or if the cathodic protection system forms part of a larger contract, the ‘Competent Person’ shall be involved by supervising, approving, or consulting continually during the contract.
Alumnium anodes should be cast from CLEAN special high grade aluminium sometimes referred to as the four 9’s ie 99.99% Al. The performance of sacrificial anodes will greatly reduce and occasionally prevent it from working if the iron (Fe) content is above as little as 0.090%. The internationally recognized specification for Aluminium is MIL-A-24779 and is as follows:
Aluminium Anodes Specification
ALUMINIUM CHEMICAL COMPOSITION
Zn- min. 4.00% - max. 5.00%
It is always wise to ensure that anodes have full traceability and are each individually stamped with alloy melt numbers. The melt number can be easily traced by the manufacturer to provide you with documentation containing full Chemical Analysis and electrochemical testing if required.
Manufacturers Production and Inspection specifications should be in accordance with DNV RP B401 Jan 2005, NORSOK, NACE RP0387-99 or NACE RP0482-99 for bracelets anodes.
Design specification should follow DNV RP B 401 Jan 2005, NORSOK, BS 7361 Part 1: 1991 or NACE RP0176-2003.
ANODE DESIGN LIFE SHOULD NOT BE TAKEN FOR GRANTED
Cathodic protection company MCPS Limited advises that changes in the long-term testing procedures for sacrificial anodes mean that some anode material related CP design parameters currently in use could result in the reduced life of the CP system of marine and offshore assets. Shortfalls in design life of up to 20 percent are possible which could result in increased corrosion and the potential for catastrophic failure.
After discussions with classification society Det Norske Veritas (DNV), DNV has confirmed to MCPS Limited that the latest release of Cathodic Protection Design DNV RP B401 in 2005 contains significant changes to the testing procedures for sacrificial anodes. Previously, the 1993 version stated that ‘best case’ alloys could be used for testing electrochemical efficiency but this has been revised because if subsequent production does not meet this quality level, the protective capacity of these anodes could be affected.
The 2005 revision calls for Long Term testing using samples from a ‘worst case’ alloy that have been cut from an actual anode,(instead of a ‘best case’ alloy taken from samples in accordance with the 1993 revision), and the chemical composition of the test material should include the maximum limits of impurities and the minimum content of alloying elements.
“DNV has concurred with MCPS Limited’s contention that “testing based on the sampling procedures given in the 1993 and 2005 revisions is not directly comparable”. In reality the old test would show artificially high capacities if the samples were not taken from an actual large anode”, says Glenn English, Professional Member of ICME (Institute of Cast Metals Engineers) and Managing Director of MCPS Limited.
Many cathodic protection designers claim that because some anode manufacturer’s long-term test results show electrochemical efficiencies as high as 2,500 Ah/kg (carried out before 2005), they can be used as the basis for an extended design life. DNV advises against the use of design values approaching 2,500 Ah/kg since this does not reflect the true performance of anodes designed for a life of 20 years and more.
“When designers ask for anode capacities higher than what is possible in practice, a reduced design life of up to 20% can result with potentially catastrophic consequences,” says Mr English. “DNV recommends the use of an electrochemical efficiency value of 2,000 Ah/kg for design purposes, and would consider any test results of 2,200 Ah/kg or more as adequate to verify compliance with this design value.” MCPS Limited’s long-term test carried out 2007-8 achieved a result of 2,357 Ah/kg.
DNV has given MCPS Limited permission to show clients a copy of their letter confirming the above information.
Please contact us to discuss your cathodic protection needs.
MCPS Limited, About MCPS Limited:
102-2A, Throckley Way, MCPS Limited has over 10 years design and manufacturing
Middlefields Ind. Est., experience providing cathodic protection and marine growth
South Shields, prevention systems to the marine, offshore and civil marine
Tyne & Wear, industries. The company’s core business is to produce the
NE34 0NU, highest quality aluminium and zinc sacrificial anodes.
United Kingdom. The company’s headquarters are located in the NE of
Tel: + 44 (0)191 456 0466 England, and as well as having two foundries in the UK
Fax: + 44 (0) 191 454 1066 producing anodes for European and African markets, they
Web: http://www.mcpsltd.com supply stocks to North and South American and have
Company Registered in England manufacturing facilities in the Middle East supplying that
Registration No: 3725809 region as well as the Far East.