Yet Another Bulletin Board
Sponsored by: The Fans!
Welcome, Guest. Please Login or Register.
Dec 22nd, 2024, 7:49pm

Upcoming Premiere Dates:
Survivor 23, Season premiere
Thursday, September 14 (8:00-9:30 PM, ET/PT) on CBS
Home Home Help Help Search Search Members Members Chat Chat Member Map Member Map Login Login Register Register

| Fantasy Survivor Game | Music Forums | The '80s Server Forums | Shop Online |


Metropolis Reality Forums « Knowledge of stainless steel »

   Metropolis Reality Forums
   Amazing Race
   Fantasy Amazing Race Games (Moderators: JP, Heather, Isle_be_back)
   Knowledge of stainless steel		 Previous topic | New Topic | Next topic »
Pages: 1  Reply Reply Add Poll Add Poll Notify of replies Notify of replies Send Topic Send Topic Print Print
   Author  Topic: Knowledge of stainless steel  (Read 160 times)
qizhen0926
Guest

Email
Knowledge of stainless steel
« on: Jun 25th, 2018, 5:02am »		 Quote Quote Modify Modify Remove Remove
electrochemical corrosion
The corrosion phenomenon of stainless steel at high temperature is mentioned earlier. Next, let's talk about the corrosion of stainless steel at room temperature. It is necessary to know that temperature has a great relationship with the oxidation resistance of stainless steel, because the surface oxidation temperature of different stainless steel is different, so the correct selection of stainless steel should be considered at what temperature, and then consider other aspects of the performance and requirements. Here, we should have a little understanding of stainless steel, stainless steel is conditional. So, how does the electrochemical corrosion happen? First of all, it should be known that the elements of the material world and the composition of the compounds have different electrode potential (electrode potential), that is to say, there is an electrode potential between different substances. Once a solution or electrolyte is used to enrich two substances, a battery circuit is created to form a micro current. This means that electrical corrosion is a common phenomenon.Acero de aleación de construcción laminado en caliente
Some factors of point corrosion5 15 25 Kgs MIG ER309 Alambre de soldadura de acero inoxidable
(1) inclusions on the surface of stainless steel: there are inclusions on the surface, such as oxide, sulfide, silicate and so on. If the surface is accompanied by a water solution, the water is electrolyzed between two substances, the water is produced by the micro current, the water electrolysis is hydrogen ion and hydrogen oxygen ion, and the hydrogen and oxygen ions can react with chromium to become chromium hydroxide and corrode.
2. Rough surface of stainless steel: there are rough surfaces such as pitting or pitting on the surface. The rough surface is easy to deposit the suspended particles in the air (dust), and the dust adsorbs the water in the air. Thus, the water is present. The water is electrolyzed under the electrode potential of the two material, and the hydrogen and oxygen ions are decomposed, and the hydrogen and oxygen ions are corrupted with chromium.
Chlorine ion environment: when the surface of stainless steel is in the atmosphere of chloride ion, the chloride ion selectively destroys the surface passivation film. The selectivity is because there are inclusions, rough points, composition segregation and mechanical properties difference on the surface of the stainless steel. Chlorine ions are electrolytes, chloric ions and oxygen can produce hypochloric acid, hydrogen oxygen ions and chromium. The chromium hydroxide is formed by reaction. Once the passivation film is destroyed, the corrosion concentration will occur, also known as pitting corrosion.Tubo de acero de carbono de 450 mm de diámetro
IP Logged
Back to top
Pages: 1  Reply Reply Add Poll Add Poll Notify of replies Notify of replies Send Topic Send Topic Print Print

Previous topic | New Topic | Next topic »

Metropolis Reality Forums » Powered by YaBB 1 Gold - SP 1.3.1!
YaBB © 2000-2003. All Rights Reserved.