D88尊龙

你好,歡迎來到濟南D88尊龙環能燃氣發電設備有限公司官方網站!

對于發電機組除銹的物理方法

來源:http://dgxcbw.comD88尊龙   發布于:2019-03-13

銹是金屬外表與空氣中氧、水分以及酸類物質接觸而生成的氧化物,如Fe0、Fe3O4、FeO3等,通常稱為鐵銹。柴油發電機組去銹的主要辦法有機械法、化學酸洗法和電化學酸蝕法。下面由康邦小編為大家詳細引見下。

D88尊龙Rust is an oxide formed by the contact of metal surface with oxygen, water and acids in the air, such as Fe0, Fe3O4, FeO3, etc. It is usually called rust. The main methods of rust removal for diesel generating units are mechanical method, chemical pickling method and electrochemical etching method. Below by Kang Bang Xiaobian for your detailed introduction below.

(1)機械法

(1) Mechanical method

應用機械零部件間的摩擦、切削等作用肅清零件外表銹層。常用的辦法有刷、磨、拋光和噴砂等。單件小批維修靠人工用鋼絲刷、刮刀、砂布等刷、刮或打磨銹蝕層。成批的零部件或有條件的單位,可用電動機或風動機等作動力,帶動各種除銹工具停止除銹,如電動磨光、拋光、滾光等。噴砂除銹是應用緊縮空氣,把一定粒度的砂子經過噴槍噴在零件的銹蝕外表上。它不只除銹快,還可為油漆、噴涂、電鍍等工藝做好準備。經噴砂后的外表潔凈,并有一定的粗糙度,能進步掩蓋層與零件的分離力。機械法除銹只能用在不重要的機械零部件外表。

QQ截圖20171025151837.jpg

Apply friction and cutting between mechanical parts to remove rust layer on the surface of parts. Common methods include brushing, grinding, polishing and sandblasting. Small batch repairs depend on manual brushing, scraper, sand cloth and other brushing, scraping or polishing rust layer. Batch parts or conditional units can be driven by motors or wind turbines to stop rust removal by various rust removal tools, such as electric polishing, polishing, rolling, etc. Sandblasting rust removal is the application of compressed air, a certain size of sand through the gun sprayed on the rust surface of parts. It not only removes rust quickly, but also prepares for painting, spraying, electroplating and other processes. After sandblasting, the surface is clean and has a certain roughness, which can improve the separation force between the cover layer and the parts. Mechanical rust removal can only be used in the appearance of unimportant mechanical parts.

(2)化學法

D88尊龙(2) Chemical method

這是一種應用化學反響把金屬外表的銹蝕產物溶解掉的酸洗法。其原理是酸對金屬的溶解以及化學反響中生成的氫對銹層的機械作用而使銹層零落。常用的酸包括鹽酸、硫酸、磷酸等。由于金屬的材質不同,運用的溶解銹蝕產物的化學藥品也有所不同。選擇除銹的化學藥品和其運用操作條件主要依據金屬的品種、化學組成、外表情況和零件尺寸精度及外表質量等要素來肯定。

D88尊龙This is an acid pickling process that uses chemical reactions to dissolve rust products on the surface of metals. The principle is that the dissolution of metal by acid and the mechanical action of hydrogen produced in chemical reaction on rust layer make rust layer scattered. Commonly used acids include hydrochloric acid, sulfuric acid, phosphoric acid, etc. Because of the different materials of metals, the chemicals used to dissolve rust products are also different. The selection of rust-removing chemicals and their operating conditions are mainly determined by the variety of metals, chemical composition, external expression, dimensional accuracy and external quality of parts.

(3)電化學酸蝕法

(3) electrochemical etching

就是把零部件放置在電解液中通以直流電,經過化學反響到達除銹目的。這種辦法比化學法快,能更好地保管基體金屬,酸的耗費量少。普通分為兩類:一類是把被除銹的零部件作為陽極;另一類是把被除銹的零件作為陰極。陽極除銹是由于通電后金屬溶解以及在陽極的氧氣對銹層的撕裂作用而使銹層別離。陰極除銹是由于通電后在陰極上產生的氫氣使氧化鐵復原和氫對銹層的撕裂作用使銹蝕物從零件外表零落。上述兩類辦法,前者主要缺陷是當電流密渡過高時,易腐蝕過度,毀壞零件外表,故適用于外形簡單的零件。然后者雖無過蝕問題,但氫易進入金屬中,產生氫脆,降低零件塑性。因而,需依據銹蝕零件的詳細狀況肯定適宜的除銹辦法。

D88尊龙It is to place the parts in the electrolyte through direct current, through chemical reaction to achieve the purpose of rust removal. This method is faster than chemical method, can better preserve the matrix metal, acid consumption is less. Generally, there are two kinds: one is to use the rusted parts as the anode; the other is to use the rusted parts as the cathode. Anodic rust removal is due to the dissolution of metal after electrification and the tearing of rust layer by oxygen in the anode. The cathode rust removal is due to the hydrogen generated on the cathode after electrification, which restores iron oxide and tears the rust layer by hydrogen, so that the rust is scattered from the surface of the parts. The main defect of the former is that when the current density is too high, it is easy to corrode excessively and destroy the appearance of parts, so it is suitable for parts with simple shape. Then, although there is no corrosion problem, hydrogen easily enters the metal, resulting in hydrogen embrittlement and reducing the plasticity of the parts. Therefore, it is necessary to confirm the appropriate rust removal method according to the detailed condition of the rusted parts.


上一篇:燃氣發電機組工作循環流程
下一篇:D88尊龙燃氣發電機組獨特的優勢特點介紹