Corrosion Rate Conversion Calculator

To convert corrosion rates from millimeters per year (mm/year) to inches per year (in/year), you can use the conversion factor of approximately 0.03937. Simply multiply the corrosion rate in mm/year by this factor to obtain the equivalent corrosion rate in in/year. For example, 1 mm/year is approximately equal to 0.03937 in/year.

To create a corrosion rate conversion table, you’ll want to convert corrosion rates from one unit of measurement to another. The most common units for corrosion rates are millimeters per year (mm/year) and inches per year (in/year), but you may encounter other units like micrometers per year (μm/year) or mils per year (mils/year). Here’s a conversion table for mm/year to other common units:

Corrosion Rate (mm/year)	Corrosion Rate (in/year)	Corrosion Rate (μm/year)	Corrosion Rate (mils/year)
1 mm/year	0.03937 in/year	1000 μm/year	39.37 mils/year
0.1 mm/year	0.003937 in/year	100 μm/year	3.937 mils/year
0.01 mm/year	0.0003937 in/year	10 μm/year	0.3937 mils/year
0.001 mm/year	0.00003937 in/year	1 μm/year	0.03937 mils/year

You can create a similar table for other conversions as needed. Keep in mind that these are approximate conversions, and you may want to use more precise conversion factors depending on your specific requirements.

FAQs

1. How do you calculate corrosion rate? The corrosion rate (CR) can be calculated using the formula: CR (mm/year) = (Weight loss (g) / (Density (g/cm³) x Area (cm²) x Time (years)))
2. How do you convert corrosion rate to corrosion current? Corrosion current (I_corr) can be estimated using Faraday’s law: I_corr (A) = (CR (mm/year) x 1E-3 g/mm) / (Atomic weight (g/mol) x Faraday’s constant (C/mol))
3. What is an acceptable corrosion rate? Acceptable corrosion rates vary depending on the application and material. Generally, for structural steel, a corrosion rate of less than 0.2 mm/year is considered acceptable.
4. What is corrosion rate miles per year? To convert corrosion rate from mm/year to miles per year, you can use the appropriate conversion factor. Approximately 1 mm/year is equivalent to 0.00003937 inches per year, and then you can convert inches to miles.
5. What is the relationship between corrosion rate and current density? Corrosion rate and current density are related through Faraday’s law, where corrosion rate is proportional to current density and the equivalent weight of the corroding material.
6. What is K in corrosion rate formula? In the corrosion rate formula, “K” is not typically used. The formula usually involves weight loss, density, area, and time as mentioned in question 1.
7. Which rate of corrosion is high? A high corrosion rate is one that results in significant material loss over a short period. What’s considered high varies depending on the material and application, but generally, any corrosion rate significantly above 1 mm/year is considered high.
8. What is the average corrosion rate of steel? The average corrosion rate of steel can vary widely depending on the environment. However, it’s often considered to be around 0.1 mm/year in many atmospheric conditions.
9. What is the ASTM test for corrosion? ASTM G31 and ASTM G71 are some of the ASTM standards used for conducting corrosion tests.
10. Does corrosion rate increase with time? Corrosion rate can increase with time if the corrosion process is not adequately controlled or if the environment becomes more corrosive.
11. What is the corrosion rate of steel in water? The corrosion rate of steel in water can vary significantly depending on the water composition and conditions. It may range from very low values to several millimeters per year in aggressive environments.
12. What is the relationship between temperature and corrosion rate? Generally, higher temperatures can accelerate corrosion rates. The exact relationship depends on the specific materials and environment.
13. Does density affect corrosion? Density of the corroding material is used in the corrosion rate calculation but doesn’t directly affect the corrosion process itself.
14. What is the effect of metal in the rate of corrosion? Different metals exhibit varying rates of corrosion in different environments. Some metals are more corrosion-resistant than others.
15. What are the five factors which affect the rate of corrosion? Five factors that affect corrosion rate include:
    • Environment
    • Material
    • Temperature
    • Electrolyte conductivity
    • Surface area
16. How is K value calculated? K value in corrosion is not a standard term. It may refer to rate constants in specific corrosion reactions, which are determined experimentally.
17. What is the corrosion rate of carbon steel? The corrosion rate of carbon steel can vary widely depending on the conditions but is typically in the range of 0.1 to 1 mm/year in various environments.
18. What are the four main types of corrosion? The four main types of corrosion are:
    • Uniform corrosion
    • Pitting corrosion
    • Crevice corrosion
    • Galvanic corrosion
19. How do you measure the corrosion rate of metals? Corrosion rate of metals can be measured through techniques such as weight loss, polarization resistance, electrochemical methods, and corrosion coupons.
20. What controls corrosion rate? Corrosion rate is controlled by various factors including environmental conditions, material properties, and the presence of protective coatings.
21. What is the corrosion rate of 316 steel? The corrosion rate of 316 stainless steel depends on the environment but is generally low, often less than 0.1 mm/year in many conditions.
22. Is rust and corrosion the same thing? Rust is a specific form of corrosion that occurs on iron and iron alloys, typically involving the formation of iron oxide.
23. What is corrosion test as per ASTM B117? ASTM B117 is a standard for conducting salt spray (fog) corrosion testing on coated and uncoated materials.
24. What is the ISO standard for corrosion test? ISO 9227 is the ISO standard for salt spray corrosion testing, similar to ASTM B117.
25. What are the ASTM steel standards? ASTM has numerous standards related to steel, including ASTM A36, ASTM A572, ASTM A516, and many others, which specify requirements for different steel grades and applications.
26. Does sunlight speed up corrosion? Sunlight can accelerate certain types of corrosion, such as UV-induced degradation of polymers or coatings, but its effect on metals can vary depending on other environmental factors.
27. What makes corrosion faster? Corrosion can be accelerated by factors such as exposure to corrosive environments (e.g., saltwater), higher temperatures, and increased oxygen levels.
28. Which metals corrode faster? Metals like aluminum, iron, and magnesium can corrode faster in certain environments compared to corrosion-resistant materials like stainless steel or titanium.
29. Why does steel have a high corrosion rate? Steel can have a relatively high corrosion rate because it contains iron, which readily reacts with oxygen and water to form iron oxide (rust) under certain conditions.
30. What is the corrosion rate of low carbon steel in water? The corrosion rate of low carbon steel in water can vary but is generally in the range of 0.1 to 1 mm/year in typical conditions.
31. At what temperature does corrosion increase? Corrosion rates often increase with temperature, but the exact temperature at which it accelerates depends on the specific materials and environment.
32. What is the variation of corrosion rate versus temperature? The relationship between corrosion rate and temperature can vary, but in many cases, corrosion rates tend to increase with higher temperatures.
33. Does heat speed up corrosion? Generally, higher temperatures can accelerate corrosion rates, but the extent of acceleration depends on various factors.
34. What are the 3 factors that affect corrosion? Three key factors that affect corrosion are the environment, the material’s susceptibility to corrosion, and the presence of electrochemical reactions.
35. What are 4 factors that can affect the rate of corrosion of an object? Four factors that can affect the rate of corrosion of an object are temperature, humidity, exposure to corrosive chemicals, and the presence of protective coatings.
36. Does pressure affect corrosion rate? Pressure can influence the corrosion rate, especially in high-pressure environments, but its effect varies depending on the specific conditions.
37. Why is it important to know the rates of corrosion? Knowing the rates of corrosion is crucial for assessing the durability of materials and structures, predicting maintenance needs, and ensuring safety and reliability.
38. What is corrosion rate influenced by? Corrosion rate is influenced by environmental factors, material properties, temperature, and electrochemical reactions.
39. Which metals corrode most vs least? Different metals have varying susceptibility to corrosion. For example, noble metals like gold and platinum corrode very little, while iron and aluminum are more prone to corrosion.
40. What are the two most important factors that promote corrosion? The two most important factors that promote corrosion are the presence of moisture (water) and the presence of oxygen.
41. How does pH affect corrosion rate? pH can significantly affect corrosion rates. Low pH (acidic conditions) can accelerate corrosion, while high pH (alkaline conditions) can reduce corrosion rates.
42. What are the two most important factors in preventing corrosion? The two most important factors in preventing corrosion are the use of protective coatings and the application of corrosion inhibitors.
43. What is a good K value? The term “K value” is not standard in corrosion rate calculations. The acceptability of a corrosion rate depends on the specific application and material, but lower corrosion rates are generally preferred.
44. What is the difference between R value and K value? The terms “R value” and “K value” are not commonly used in the context of corrosion. They may refer to specific parameters in certain scientific experiments but do not have standard meanings in corrosion studies.
45. What should K values be? Without specific context, it’s challenging to determine what “K values” should be. The acceptability of corrosion rates depends on the industry, application, and material being used.
46. What is the formula for corrosion rate? As mentioned earlier, the formula for corrosion rate is: CR (mm/year) = (Weight loss (g) / (Density (g/cm³) x Area (cm²) x Time (years)))
47. What are standard corrosion rates? Standard corrosion rates vary widely depending on the material and environment. Industry-specific standards may define acceptable corrosion rates for specific applications.
48. What is a bad corrosion rate? A bad corrosion rate is one that results in rapid material degradation and poses a threat to the structural integrity or functionality of a component or structure. What’s considered “bad” depends on the context.
49. What are the 7 types of corrosion? The seven types of corrosion include:
    • Uniform corrosion
    • Pitting corrosion
    • Crevice corrosion
    • Galvanic corrosion
    • Intergranular corrosion
    • Selective leaching
    • Erosion corrosion
50. What are the 6 classifications of corrosion? The six classifications of corrosion are:
    • Atmospheric corrosion
    • Aqueous corrosion
    • Soil corrosion
    • Microbiologically influenced corrosion (MIC)
    • High-temperature corrosion
    • Stress corrosion cracking
51. What are the three requirements for corrosion to occur? The three requirements for corrosion to occur are:
    • An electrolyte (usually moisture or a conducting solution)
    • An anode (where corrosion occurs)
    • A cathode (where reduction reactions occur)