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                    鋅鋼道路護欄產生大氣腐蝕的情況有哪些?

                    來源:http://www.penidatrip.com添加時間:2021-09-07 15:21:27

                    (1)護欄鋼板的表面整體覆蓋上鋅涂層,此時的腐蝕是鋅在大氣中的腐蝕。由于鋅腐蝕產生的產物對自身的保護作用,腐蝕速度相對較慢。鍍鋅層通過將鋼與大氣(腐蝕性環境)物理隔離,保護了鋼免受到腐蝕。

                    (1) The surface of the guardrail steel plate is covered with zinc coating as a whole, and the corrosion at this time is the corrosion of zinc in the atmosphere. Due to the protective effect of the products produced by zinc corrosion on itself, the corrosion speed is relatively slow. The zinc coating protects the steel from corrosion by physically isolating the steel from the atmosphere (corrosive environment).

                    (2)鍍鋅層因腐蝕及其它原因,鏡鋅層中合金層部分地暴露于大氣中,這時鋼板仍受到與頭一種情況相同形式的整體地保護。只是因電極電位之不同,電位較負的純鋅層將對電位較正的合金層提供電化學保護而先腐蝕。

                    (2) The alloy layer in the mirror zinc layer is partially exposed to the atmosphere due to corrosion and other reasons. At this time, the steel plate is still protected in the same form as the first case. Due to the difference of electrode potential, the pure zinc layer with negative potential will provide electrochemical protection to the alloy layer with positive potential and corrode first.

                    QQ截圖20160902152058.png

                    (3)當鍍鋅層在腐蝕時,純鋅層的腐蝕殆盡,但是合金層仍能夠完整的覆蓋鋼板表而,這時合金層發揮的作用,仍與前兩種情況一樣,是一種隔斷環境中的物理保護形式。

                    (3) When the galvanized layer is corroded, the pure zinc layer is completely corroded, but the alloy layer can still completely cover the steel plate surface. At this time, the role of the alloy layer is still the same as the first two cases, which is a form of physical protection in the isolation environment.

                    (4)當鍍層部分缺損(如局部腐蝕、劃傷、切口、沖孔等情況)使鋅鋼道路護欄中的鋼板暴露在空氣中時情況變得比較復雜。在潮濕大氣中,由于水的存在Zn、Fe-Zn、Fe都形成電極并處于平衡狀態。

                    (4) When the partial defects of the coating (such as local corrosion, scratch, notch, punching, etc.) expose the steel plate in the zinc steel road guardrail to the air, the situation becomes more complex. In humid atmosphere, due to the existence of water, Zn, Fe Zn and Fe form electrodes and are in equilibrium.

                    (5)當純鋅層消耗殆盡,鋼鐵部分的外露在大氣中時,Zn-Fe合金層因電位較鐵是為負,仍然對鐵進行了電化學的保護,但因其電位相對于較正,因此所供于的電化學保護的能力較差。

                    (5) When the pure zinc layer is exhausted and the steel part is exposed in the atmosphere, the Zn Fe alloy layer still provides electrochemical protection for iron because the potential is negative compared with iron, but its potential is relatively positive, so the ability of electrochemical protection is poor.

                    (6)在合金鍍層用作電化學保護之中的陽極而消耗完以后,鋼鐵便進入空氣腐蝕的過程之中,并由其所處的具體環境來決定其使用壽命。

                    (6) After the alloy coating is consumed as an anode in electrochemical protection, steel enters the process of air corrosion, and its service life is determined by its specific environment.

                    鍍鋅層對鋅鋼護欄的保護作用不但體現在大氣腐蝕的情況下,還體現在電解液之中的電化學腐蝕情況下。

                    The protective effect of zinc coating on zinc steel guardrail is reflected not only in the case of atmospheric corrosion, but also in the case of electrochemical corrosion in electrolyte.

                    總之,因鋅鍍層對鋅鋼道路護欄具有良好的防護成果,生產成本低,鍍層的厚度、韌性和表面狀態可控,鋼鐵產品的鋅鍍層處理在日常生活之中得到了越為廣泛的應用。

                    In short, because zinc coating has good protection results for zinc steel road guardrail, low production cost and controllable coating thickness, toughness and surface state, zinc coating treatment of iron and steel products has been more and more widely used in daily life.

                    以上的信息就是山東鑄鐵護欄給小編提供的知識分享,更多的精彩內容請點擊我們的網站:http://www.penidatrip.com我們后續會有更多的內容等您查看

                    The above information is the knowledge sharing provided by Shandong Iron Casting Co., Ltd. to Xiaobian. For more wonderful contents, please click our website: http://www.penidatrip.com We will have more content for you to check later


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