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Corrosion

Corrosion Resistant Material






In normal mechanical and structural engineering design materials are selected primarily for their mechanical properties-corrosion is not an important criteria. The systems are generally protected against corrosion by surface coatings. Most machines are located indoors and are accessible for inspection and maintenance. The exceptions to this are machines used for construction and agriculture. These machines may well be used in corrosive environments but they are generally regularly maintained and some level of corrosion is acceptable.

In process engineering corrosion is a very important design factor and material are selected primarily on their corrosion resistance properties. Surface coatings are often not considered because of the risk of contaminating the process stream.

Metal Corrosion Properties - Non Chemiscal Environments

Ratings 0 = Unsuitable, 1 = poor, 2 = Fair, 3 =Fair to Good, 4 good, 5 = good to excellent, 6= excellent.

  Fresh Water Sea
Water
Steam Steam
Cond'te
Air
Metal Static/Turb Static/Turb Dry Wet City/Indust
Grey Cast Iron-
Plain or Low Alloy
4/3 4/3 4 4 3
Ductile Iron
(High Strength )
4/4 4/2 4 4 3
Cast Iron Ni_Resist.
(14% Ni, 7% Cu, 2% Cr bal Fe)
5/5 5/5 5 5 4
Ductile Iron Ni_Resist.
(24 % Ni, bal Fe)
5/5 5/5 5 5 4
Mild Steel- Low Alloy steels 4/3 4/2 4 4 3
Stainless Steel Ferritic
(17% Cro)
4/6 1/4 6 5 3
Stainless Steel Austenitic
(18% Cro ,8% Ni )
6/6 2/5 6 5 4
Stainless Steel Austenitic
(18% Cro 12% Ni, 2.5% Mo )
6/6 3/5 6 6 6
Stainless Steel Austenitic
(20% Cro 29% Ni, 2.5% Mo,3.5% Cu )
6/6 4/6 6 6 6
Hastelloy Alloy
(55% Ni, 17% Mo,16% Cr, 6% Fe, 4% W)
6/6 6/6 6 6 6
Inconel
(78% ni,15% Cr, 7% Fe)
6/6 4/6 6 6 6
Copper Nickel alloys
(Up to 30% Ni)
6/6 6/6 5 6 5
Monel 400
(66% Ni, 30% Cu, 4% Si)
6/6 6/6 6 6 5
Nickel Commercial
(99% Ni)
3/5 6/6 6 6 4
Copper and Silicon Bronze 6/5 4/1 5 6 5
Aluminium Brass 6/6 4/5 5 6 5
Bronze
(88% Cu,5% Sn,5% Ni,2% Zn)
6/6 5/5 5 6 5
Aluminium Alloys 4/5 0-5/4 2 5 5
Lead (Chemical or antimonial) 6/5 5/3 0 2 5
Silver 6/6 5/5 5 6 6
Titanium 6/6 6/6 5 6 6
Zirconium 6/6 6/6 5 6 6

Metallographic Test - Metallography Testing
Metallographic Test Report
Stress Corrosion Cracking (SCC)
Chloride Stress Corrosion Cracking
Stainless Steel Corrosion
Intergranular Corrosion
Corrosion of Piping
Corrosion Process
Surface Coatings for Corrosion
Corrosion Resistant Material
Bi- Metallic Corrosion.Galvanic Corrosion
Intergranular Corrosion of Stainless Steel Tubes
Corrosion Resistant Stainless Steel Tube
Corrosion Resistance of Stainless Steel Tubes
Seawater Resistance of Stainless Steel Tubes
Corrosion Mechanism in Stainless Steel Tube
Austenitic stainless steel for timber fixings
Causes of metal corrosion in timber fixings
ASTM A262 Intergranular Corrosion Test IGC
ASTM E112 Standard Test Methods for Determining Average Grain Size
Methods of minimizing chloride stress corrosion cracking


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2507 Super Duplex Pipe
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1.4462 Stainless Steel Pipe
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EN 10216-5
ASTM A789 ASME SA 789 S31803 S32205 S32101 S32750 S32760 S32304 S31500 S31260 Seamless Tubes
EN 10216-5 1.4462 1.4362 1.4162 1.4410 1.4501 Seamless Tubes
Nickel Alloy Tubing:

UNS N08020 Alloy 20 Tubing
UNS N02200 Alloy 200 Tube
UNS N02201 Alloy 201 Pipe
UNS N04400 Monel 400 Tubing
N06600 Inconel 600 Tube
N06601 Inconel 601 Tubing
N06625 Inconel 625 Tubes
N08800 Incoloy 800 Tube
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N08811 Incoloy 800HT Tubing
UNS N08825 Incoloy 825 Pipe
ASTM B622 N10276 C276 Tubing
ASTM B622 N06022 Hastelloy C-22 Alloy Tubes
C28000 Brass Seamless Tubes C44300 Brass Seamless Tubes
C68700 Brass Seamless Tubes
C70600 Copper Nickel Tubes
C71500 Copper Nickel Tubes
DIN 2391 Seamless Precision Steel Tubes
EN 10305-1 E215 E235 E355 Seamless Precision Steel Tube Tubing Tubes
DIN 2393 St28 St34.2 St37.2 St44.2 St52.3 Welded Precision Steel Tubes
EN 10305-2 E195 E235 E355 Welded Cold Drawn Precision Steel Tube