Tuesday, January 4, 2022

Corrosion Resistant Material By wilsonpipeline.com

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 WaterSea
Water
SteamSteam
Cond’te
Air
MetalStatic/TurbStatic/TurbDryWetCity/Indust
Grey Cast Iron-
Plain or Low Alloy
4/34/3443
Ductile Iron
(High Strength )
4/44/2443
Cast Iron Ni_Resist.
(14% Ni, 7% Cu, 2% Cr bal Fe)
5/55/5554
Ductile Iron Ni_Resist.
(24 % Ni, bal Fe)
5/55/5554
Mild Steel- Low Alloy steels4/34/2443
Stainless Steel Ferritic
(17% Cro)
4/61/4653
Stainless Steel Austenitic
(18% Cro ,8% Ni )
6/62/5654
Stainless Steel Austenitic
(18% Cro 12% Ni, 2.5% Mo )
6/63/5666
Stainless Steel Austenitic
(20% Cro 29% Ni, 2.5% Mo,3.5% Cu )
6/64/6666
Hastelloy Alloy
(55% Ni, 17% Mo,16% Cr, 6% Fe, 4% W)
6/66/6666
Inconel
(78% ni,15% Cr, 7% Fe)
6/64/6666
Copper Nickel alloys
(Up to 30% Ni)
6/66/6565
Monel 400
(66% Ni, 30% Cu, 4% Si)
6/66/6665
Nickel Commercial
(99% Ni)
3/56/6664
Copper and Silicon Bronze6/54/1565
Aluminium Brass6/64/5565
Bronze
(88% Cu,5% Sn,5% Ni,2% Zn)
6/65/5565
Aluminium Alloys4/50-5/4255
Lead (Chemical or antimonial)6/55/3025
Silver6/65/5566
Titanium6/66/6566
Zirconium6/66/6566

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