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Galvanic Corrosion Chart | Galvanic Compatibility - Anodic Index - Cathodic
Page 1 of 2
Fastening and assembly solutions 08458 121 220 [email protected]
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ENGINEERING RESOURCES
All dissimilar materials have the potential to react with each other when they are brought together in the presence of a catalyst. In most circumstances this reaction is so mild as to be of no importance, but when the wrong materials are used in combination and then exposed to an electrolyte such as water the effects can become much more noticeable. For applications where humidity is low then you can generally ignore galvanic corrosion. If on the other hand you are working on a project for use in damp conditions or outside then it is best to pay some regard to the possible effects of galvanic corrosion.
Select Language ▼
read more
As a rule it is best to use metals which are as close together as possible in the table below. Doing this will help to eliminate any possibility of galvanic corrosion. If you do have to mix materials then take a look at the galvanic compatibility section.
Active (Anodic) Most Likely To Corrode Magnesium
New Southco E5 Push to Close latch New addition to the E5 latch range adds push to close functionality read more
Magnesium alloys Zinc (hot-dip, die cast, or plated) Aluminium 1100, 3003, 3004, 5052, 6053 Tin (plated) Lead
NeoSpeed Rivets Offer Many benefits to manufacturing New Speed Riveting concept from Avdel reduces assembly time and improves quality
read more
Steel 1010
Stainless steel Swaging stud for use in any material The new PEM® SGPC swaging stud is a versatile new option for a variety of applications
Iron (cast) Stainless steel 410 (active) Copper (plated, cast, or wrought) Nickel (plated)
Latest Model Pemserter® PS4 Press Available For Free Trial The new Series 4 press is now available from stock at unbeatable prices
Chromium (Plated) Stainless steel 301,304,310 (active) Stainless steel 430 (active) Tungsten Brass Nickel-silver (18% Ni) Stainless steel 316L (active) Bronze 220 Copper 110
read more
Red Brass Stainless steel 347 (active)
BCT Special Purpose Rivet Nuts A new range of inserts for difficult applications from BBA
Copper-nickel 715 iralty brass Stainless steel 202 (active) Bronze, Phosphor Monel 400 Stainless steel 201 (active)
read more
Stainless steel 321 (active) Stainless steel 316 (active) Stainless steel 309 (active) Stainless steel 17-7PH (ive) Silicone Bronze 655 Stainless steel 301,304,321 (ive) Stainless steel 201,286 (ive)
read more
New Speed Riveting Tool If you use conventional rivets the Avdel Speed Rivet system can reduce assembly time and costs
Stainless steel 316L (ive) Stainless steel 202 (ive) Titanium
Noble (Cathodic) Least Likely To Corrode Galvanic Compatibility Often when design requires that dissimilar metals come in , the galvanic compatibility is managed by finishes and plating. The finishing and plating selected facilitate the dissimilar materials being in and protect the base materials from corrosion. For harsh environments, such as outdoors, high humidity, and salt environments fall
into this category. Typically there should be not more than 0.15 V difference in the "Anodic Index". For example; silver - nickel would have a difference of 0.15V being acceptable.
http://www.zygology.com/productcart/pc/Galvanic-Corrosion-Chart.html
8/12/2013
Galvanic Corrosion Chart | Galvanic Compatibility - Anodic Index - Cathodic
Page 2 of 2
For normal environments, such as storage in warehouses or non-temperature and
humidity controlled environments. Typically there should not be more than 0.25 V difference in the "Anodic Index". For controlled environments, such that are temperature and humidity controlled, 0.50 V
can be tolerated. Caution should be maintained when deciding for this application as humidity and temperature do vary from regions.
Anodic Index
Index (Volts)
Silver, solid or plated; monel metal. High nickel-copper alloys
0.15
Nickel, solid or plated, titanium an s alloys, Monel
0.30
Copper, solid or plated; low brasses or bronzes; silver solder; German silvery high copper-nickel alloys; nickel-chromium alloys
0.35
Brass and bronzes
0.40
High brasses and bronzes
0.45
18% chromium type corrosion-resistant steels
0.50
Chromium plated; tin plated; 12% chromium type corrosion-resistant steels
0.60
Tin-plate; tin-lead solder
0.65
Lead, solid or plated; high lead alloys
0.70
Aluminum, wrought alloys of the 2000 Series
0.75
Iron, wrought, gray or malleable, plain carbon and low alloy steels
0.85
Aluminum, wrought alloys other than 2000 Series aluminum, cast alloys of the silicon type
0.90
Aluminum, cast alloys other than silicon type, cium, plated and chromate
0.95
Hot-dip-zinc plate; galvanized steel
1.20
Zinc, wrought; zinc-base die-casting alloys; zinc plated
1.25
Magnesium & magnesium-base alloys, cast or wrought
1.75
Please Note: Galvanic corrosion is a complex problem with many variables which are difficult to predict. The information above is provided for guidance only - and is only a short summary of the issues involved. Zygology Ltd can take no responsibility for application failure resulting from errors or omissions in the data provided. Back to top
Our Galvanic Corrosion Chart shows which metals are most and which are least likely to be effected. This information is important to consider when producing fixtures and assembly solutions for use in damp conditions or outside. | & Conditions | Site map | Copyright Zygology Ltd 2013. Website design by Saturn Innovation
http://www.zygology.com/productcart/pc/Galvanic-Corrosion-Chart.html
8/12/2013
Page 1 of 2
Fastening and assembly solutions 08458 121 220 [email protected]
HOME
SERVICES
PRODUCTS
SHOP
QUALITY
NEWS
NEWSLETTER
PRODUCT SEARCH (ex Southco)
Galvanic Corrosion Chart SEARCH SOUTHCO PRODUCTS
The cart is empty.
ENGINEERING RESOURCES
All dissimilar materials have the potential to react with each other when they are brought together in the presence of a catalyst. In most circumstances this reaction is so mild as to be of no importance, but when the wrong materials are used in combination and then exposed to an electrolyte such as water the effects can become much more noticeable. For applications where humidity is low then you can generally ignore galvanic corrosion. If on the other hand you are working on a project for use in damp conditions or outside then it is best to pay some regard to the possible effects of galvanic corrosion.
Select Language ▼
read more
As a rule it is best to use metals which are as close together as possible in the table below. Doing this will help to eliminate any possibility of galvanic corrosion. If you do have to mix materials then take a look at the galvanic compatibility section.
Active (Anodic) Most Likely To Corrode Magnesium
New Southco E5 Push to Close latch New addition to the E5 latch range adds push to close functionality read more
Magnesium alloys Zinc (hot-dip, die cast, or plated) Aluminium 1100, 3003, 3004, 5052, 6053 Tin (plated) Lead
NeoSpeed Rivets Offer Many benefits to manufacturing New Speed Riveting concept from Avdel reduces assembly time and improves quality
read more
Steel 1010
Stainless steel Swaging stud for use in any material The new PEM® SGPC swaging stud is a versatile new option for a variety of applications
Iron (cast) Stainless steel 410 (active) Copper (plated, cast, or wrought) Nickel (plated)
Latest Model Pemserter® PS4 Press Available For Free Trial The new Series 4 press is now available from stock at unbeatable prices
Chromium (Plated) Stainless steel 301,304,310 (active) Stainless steel 430 (active) Tungsten Brass Nickel-silver (18% Ni) Stainless steel 316L (active) Bronze 220 Copper 110
read more
Red Brass Stainless steel 347 (active)
BCT Special Purpose Rivet Nuts A new range of inserts for difficult applications from BBA
Copper-nickel 715 iralty brass Stainless steel 202 (active) Bronze, Phosphor Monel 400 Stainless steel 201 (active)
read more
Stainless steel 321 (active) Stainless steel 316 (active) Stainless steel 309 (active) Stainless steel 17-7PH (ive) Silicone Bronze 655 Stainless steel 301,304,321 (ive) Stainless steel 201,286 (ive)
read more
New Speed Riveting Tool If you use conventional rivets the Avdel Speed Rivet system can reduce assembly time and costs
Stainless steel 316L (ive) Stainless steel 202 (ive) Titanium
Noble (Cathodic) Least Likely To Corrode Galvanic Compatibility Often when design requires that dissimilar metals come in , the galvanic compatibility is managed by finishes and plating. The finishing and plating selected facilitate the dissimilar materials being in and protect the base materials from corrosion. For harsh environments, such as outdoors, high humidity, and salt environments fall
into this category. Typically there should be not more than 0.15 V difference in the "Anodic Index". For example; silver - nickel would have a difference of 0.15V being acceptable.
http://www.zygology.com/productcart/pc/Galvanic-Corrosion-Chart.html
8/12/2013
Galvanic Corrosion Chart | Galvanic Compatibility - Anodic Index - Cathodic
Page 2 of 2
For normal environments, such as storage in warehouses or non-temperature and
humidity controlled environments. Typically there should not be more than 0.25 V difference in the "Anodic Index". For controlled environments, such that are temperature and humidity controlled, 0.50 V
can be tolerated. Caution should be maintained when deciding for this application as humidity and temperature do vary from regions.
Anodic Index
Index (Volts)
Silver, solid or plated; monel metal. High nickel-copper alloys
0.15
Nickel, solid or plated, titanium an s alloys, Monel
0.30
Copper, solid or plated; low brasses or bronzes; silver solder; German silvery high copper-nickel alloys; nickel-chromium alloys
0.35
Brass and bronzes
0.40
High brasses and bronzes
0.45
18% chromium type corrosion-resistant steels
0.50
Chromium plated; tin plated; 12% chromium type corrosion-resistant steels
0.60
Tin-plate; tin-lead solder
0.65
Lead, solid or plated; high lead alloys
0.70
Aluminum, wrought alloys of the 2000 Series
0.75
Iron, wrought, gray or malleable, plain carbon and low alloy steels
0.85
Aluminum, wrought alloys other than 2000 Series aluminum, cast alloys of the silicon type
0.90
Aluminum, cast alloys other than silicon type, cium, plated and chromate
0.95
Hot-dip-zinc plate; galvanized steel
1.20
Zinc, wrought; zinc-base die-casting alloys; zinc plated
1.25
Magnesium & magnesium-base alloys, cast or wrought
1.75
Please Note: Galvanic corrosion is a complex problem with many variables which are difficult to predict. The information above is provided for guidance only - and is only a short summary of the issues involved. Zygology Ltd can take no responsibility for application failure resulting from errors or omissions in the data provided. Back to top
Our Galvanic Corrosion Chart shows which metals are most and which are least likely to be effected. This information is important to consider when producing fixtures and assembly solutions for use in damp conditions or outside. | & Conditions | Site map | Copyright Zygology Ltd 2013. Website design by Saturn Innovation
http://www.zygology.com/productcart/pc/Galvanic-Corrosion-Chart.html
8/12/2013
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