Advantages of installation of stainless steel waterproof casing Stainless steel waterproof casing has strong resistance to pitting, crevice corrosion, chloride ion stress corrosion and intergranular corrosion resistance, especially for acid ions such as sulfate ions, chloride ion

2025/09/0121:12:37 home 1003

stainless steel waterproof casing installation advantages

stainless steel waterproof casing has strong resistance to pitting corrosion, crevice corrosion, chloride ion stress corrosion and intergranular corrosion resistance, especially for sulfate ions, chloride ions and other acid ions, and can be used in harsh working environments. Therefore, the use of stainless steel waterproof casing is becoming more and more widely. Common applications include stainless steel waterproof casing, pulp bleaching and cooking equipment, power plant flue gas desulfurization equipment, seawater cooling thin-walled condensation pipelines and seawater desalination equipment in the industry, and of course, it can also be made into chloride ions in the working environment. As a result, many low-carbon and ultra-low-carbon stainless steel waterproof casing plates are used.

stainless steel waterproof casing

Poor strength becomes a headache for using such stainless steel waterproof casing plates, so how to maintain or exceed the strength function of stainless steel waterproof casing plates after reducing carbon content is very important. Later, people found that after nitrogen element was added to the stainless steel waterproof casing, the stability of the austenitic stainless steel waterproof casing can be improved, the share of the duplex stainless steel waterproof casing can be balanced, and even the strength can be improved without affecting the plasticity and resistance of the stainless steel waterproof casing, and sometimes it can partially replace the nickel element in the stainless steel waterproof casing. The influence of nitrogen on stainless steel waterproof casing is very fierce.

The nitrogen element in the matrix of the stainless steel waterproof casing can replace part of the nickel element and reduce the content of ferrite in the stainless steel waterproof casing, which helps stabilize austenite , reduces and divides harmful intermetallic phases, and even avoids the changes in martensite during cold processing. The influence of nitrogen elements on the mechanical function of the matrix in the stainless steel waterproof casing is mainly reflected in two aspects. The primary nitrogen element can significantly improve the strength of stainless steel waterproof casing and will not reduce the plastic resistance of stainless steel waterproof casing. This is a good study on the direction of high strength and high toughness of stainless steel waterproof casing.

Secondly, nitrogen element can also enhance the ability of stainless steel waterproof casing to resist creep, fatigue and wear. Nitrogen also has advantages in the corrosion resistance of added stainless steel waterproof sleeves. The main manifestation is to improve the resistance to intergranular corrosion, pitting corrosion and crevice corrosion. The effect mechanism of nitrogen element against point corrosion and crevice corrosion of stainless steel waterproof casing is mainly acid consumption theory. Nitrogen forms NH4+, which reduces pH, hinders the dissolution of the sun, and slows down partial acidification, which can inhibit the autocatalytic process of pitting.

is followed by the enrichment of interface nitrogen. The nitrogen element is enriched near the metal side in the metal interface passivation film, which will affect the repassivation dynamics and can promote the agile and repassivation of the stainless steel waterproof casing surface, and then exert the effect of suppressing pitting. Other nitrogen and other elements can work together to exert effects. The nitrogen element can inhibit the overpassivation and dissolution of chromium, molybdenum and other elements, and can produce a stronger surface layer during the corrosion process of part of the stainless steel waterproof casing panel surface, improving the corrosion resistance of the stainless steel waterproof casing panel surface.

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