What are the domestic grades of corrosion-resistant alloys?

What are the domestic grades of corrosion-resistant alloys?

There are many types of corrosion-resistant alloys produced domestically, the most common ones are GH3030, GH3039, GH3044, GH4145,GH4169, GH2132, etc. 

These alloy materials are widely used in aerospace, petrochemical, medicine and other fields.

GH3030 is an iron-based nickel-based heat-resistant alloy with good corrosion resistance and heat resistance.

GH3039 and GH3044 are also common corrosion-resistant alloys used to manufacture high-temperature and high-pressure equipment and components.

GH4145 and GH4169 are cobalt-based and nickel-based high-temperature alloys with excellent heat resistance and corrosion resistance, and are widely used in aviation

Air engines, gas turbines and other fields. GH2132 is a new type of high temperature corrosion resistant alloy with excellent mechanical properties and

Corrosion resistance, gradually become one of the preferred materials for petrochemical and nuclear industries.

It has many applications and a wide range of uses, providing a solid material guarantee for the development of my country's high-end equipment manufacturing and high-tech industries.

Domestic corrosion-resistant alloy grades NS111, NS112, NS113, NS131, NS141, NS142, NS143, NS311,NS312,NS314,NS315,NS321,NS322,NS331,NS332,NS333,NS334,NS335,NS336,NS338,NS341,NS411, etc.

The ability of metal materials to resist corrosion in corrosive media is called the corrosion resistance of metals.

Usually one of the following three conditions is met.

Corrosion Resistant Alloy

(1) Metals with high thermodynamic stability. Usually, they can be judged by their standard electrode potential. The more positive the value, the higher the stability; the more negative the value, the lower the stability. Precious metals with good corrosion resistance, such as Pt, Au, Ag, Cu, etc., belong to this category.

(2) Metals that are easy to passivate. Many metals can form a dense oxide film with protective effect in oxidizing media. This phenomenon is called passivation. The metals that are most easily passivated are Ti, Zr, Ta, Nb, Cr, Al, etc.

(3) Metals that can form insoluble and well-protected corrosion product films on their surfaces. This situation only occurs when the metal is in a specific corrosive medium, such as Pb and Al in H2SO4 solution, Fe in H3PO4, Mo in hydrochloric acid solution, and Zn in the atmosphere.