【Corrosion Technology Edition】Daily Question 20170722: What is pitting corrosion?
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To boost the popularity of the Corrosion Technology section, foster communication among users, and enable mutual progress and improvement, we have launched the 【One Question per Day】 activity. Reward rules: 3 wealth points for replying, 10 wealth points for correct answers. This topic is valid for two days; no scoring or rewards will be given after that. Definition: What is pitting corrosion? Pitting: It occurs in extremely localized areas on the metal surface, creating cavities or pits that expand inward and can even lead to perforation. When the pit diameter is smaller than the pitting depth, it is called pitting corrosion. =========================== Event Promotion: Petrochemical Zone – “Creative Ideas for Energy Saving” event (the second phase is in full swing) http://bbs.hcbbs.com/thread-1666758-1-1.html (Source: Haichuan Chemical Industry Forum) 2017 Coal Chemical Industry Event – “My Technical Upgrades” http://bbs.hcbbs.com/thread-1786290-1-1.html (Source: Haichuan Chemical Industry Forum)
Corrosion pits that develop deeply in certain areas of the metal surface, with no corrosion or only mild corrosion in other areas, is known as pitting corrosion, also referred to as hole corrosion or pit corrosion
Pitting, also known as pinhole corrosion, is an extreme form of localized corrosion. After corrosion pits form on the metal surface, they spread deeper at a rate that is greater than or equal to their rate of spread sideways. As a result of corrosion, pits or small holes are formed in the metal, while most of the metal remains uncorroded or only suffers slight corrosion.
Corrosion pits that develop deeply in certain areas of the metal surface, with no corrosion or only mild corrosion in other areas, is known as pitting corrosion, also referred to as hole corrosion or pit corrosion
Pitting corrosion refers to localized corrosion that occurs in scattered areas, while most of the surface of the metal material remains uncorroded or only suffers mild corrosion. Generally, the pore diameter of pitting corrosion is less than 1 mm, and the depth is also less than the pore diameter. Stainless steel tends to suffer from pitting corrosion in environments containing Cl.
Pitting is a type of corrosion in which small holes develop deeply in certain areas of the metal surface, while other areas remain uncorroded or only suffer mild corrosion; this form of corrosion is known as pitting, or hole corrosion. Taking steel as an example: the rapid increase in tiny \"rust pores\" on the surface of stainless steel is what causes large-scale corrosion of this material. Even slight changes in the concentration of corrosive substances or temperature can significantly accelerate the rate of corrosion. The rapid occurrence of pitting corrosion is due to the rapid proliferation of microholes in a metastable state on the metal surface.
Pitting, also known as pit corrosion, is an extreme form of localized corrosion. After corrosion pits form on the metal surface, they spread inward at a rate that is greater than or equal to their rate of spread laterally.
It occurs in a highly localized area on the metal surface, causing cavities or pits that spread inward, and can even lead to perforations. When the pit diameter is smaller than the pitting depth, it is called pitting corrosion.
Deeply penetrating corrosion pits appear on the metal surface, with no corrosion or only mild corrosion elsewhere
Pitting, also known as spot corrosion, is a type of corrosion in which the degradation occurs over a very small area on the metal surface and penetrates deep into the metal, sometimes even causing holes to form.