今天小編為各位講解一下影響無縫方管點腐蝕的材料因（yīn）素都有哪些（xiē）。合金成分對無縫方管來（lái）說，0、10及F等元素是使合（hé）金（jīn）具有良好抗點腐蝕性能的主要合金元素。其他（tā）一些元素（sù）也（yě）可（kě）能有（yǒu）一定的效果，K等元素則會降低無縫方管的抗點腐（fǔ）蝕能力。將合金元素對（duì）材料耐點腐蝕性的影響扼要地概（gài）括於有利影響是肯定的。13、0的影響是變化的。3在固溶（róng）體中是有益的，但當作為中間（jiān）金屬相析出時則有害，0在固（gù）溶體中是無害的，當以碳化（huà）物析出（chū）時則有害，但稍有不利影響。
Today, Xiaobian will explain to you the material factors that affect the pitting corrosion of seamless square pipes. For seamless square tubes, elements 0, 10 and F are the main alloying elements which make the alloy have good resistance to pitting corrosion. Other elements may also have some effect, while K and other elements will reduce the pitting corrosion resistance of seamless square tubes. It is affirmative that the effect of alloying elements on the pit corrosion resistance of materials can be summarized briefly in terms of beneficial effects. The effects of 13 and 0 are variable. 3 is beneficial in solid solution, but harmful when precipitated as intermediate metal phase, 0 is harmless in solid solution and harmful when precipitated with carbide, but slightly harmful. (2)對奧氏體無縫方管進行冷加（jiā）工的研（yán）究表明，冷加工後試樣表（biǎo）麵的蝕坑（kēng）數目（mù）增（zēng）多和蝕坑（kēng）的（de）尺寸變小。這是因為冷（lěng）加工增加位錯密度，位（wèi）錯在（zài）表麵露頭處容易引起（qǐ）點腐蝕坑，冷加工（gōng）有增（zēng）加點腐蝕的趨勢。
(2) The research on cold-working of austenitic seamless square tubes shows that the number of pits on the surface of samples increases and the size of pits decreases after cold-working. This is due to the increase of dislocations density in cold processing, dislocations in the surface outcrop is prone to cause pitting corrosion, cold processing has the trend of increasing pitting corrosion.
(3)表麵狀態對一個（gè）給定（dìng）的合金環境體係，決定合金點腐蝕（shí）電位的因素乃是材料（liào）表麵的光潔度。事實上，對具有不同表麵光潔（jié）度的合金進行點（diǎn）腐蝕傾向的比較是（shì）毫無意（yì）義的。關於表麵（miàn）光潔度對無縫方管點腐蝕性（xìng）能影響情況如圖所示。它表明，在同樣的材料環境體係中，若表麵光潔度不同，其點腐蝕電位的（de）差（chà）別可在14以上。
(3) For a given alloy environment system, the factor that determines the pitting corrosion potential of the alloy is the smoothness of the material surface. In fact, it is meaningless to compare the pitting corrosion tendency of alloys with different surface finish. The effect of surface finish on the corrosion resistance of seamless square pipes is shown in the figure. It shows that in the same material environment system, if the surface finish is different, the difference of pitting corrosion potential can be more than 14.
(4)無（wú）縫方管在空氣中，由於加（jiā）熱而形成的（de）氧化物可能對抗點（diǎn）腐蝕性能有重大影響。由
(4) The oxide formed by heating in seamless square tubes in air may have a significant impact on the pitting corrosion resistance. from
顯微（wēi）組織（zhī）熱鍍鋅方管對合金（jīn）抗點腐蝕性能起著重要作用。各種相，如硫化物（wù）夾（jiá）雜、3鐵素體。相、敏化的晶界以及焊縫等都可能對鋼的抗點腐蝕性能具有決定性的影響，它們都是發生（shēng）點腐蝕（shí）最敏感的部位。這對顯微組織較為複（fù）雜的鑄造無縫方管以及顯微組織對熱處理工藝十分敏感的馬（mǎ）氏體型無縫方管來說，點腐蝕與（yǔ）組成相（xiàng）的關係就更為密切。需要指（zhǐ）出的是，含的複合硫化錳夾雜是點腐蝕更敏感的部位。因此（cǐ），在冶煉（liàn）無縫方管時，應避免采用鋁脫氧劑。
Microstructure galvanized square tubes play an important role in the pitting corrosion resistance of the alloy. Various phases, such as sulphide inclusions and 3 ferrite. Phases, sensitized grain boundaries and welds may have a decisive impact on the pit corrosion resistance of steel. They are the most sensitive sites for pit corrosion. For the cast seamless square tubes with complex microstructures and martensitic seamless square tubes with sensitive microstructures to heat treatment process, the relationship between pitting corrosion and constituent phases is more close. It should be pointed out that the complex manganese sulfide inclusions are more sensitive to pitting corrosion. Therefore, aluminium deoxidizer should be avoided in the smelting of seamless square tubes.
(5)焊接所產生的氧化膜對合金在烈性氯化物溶液中的抗點腐（fǔ）蝕性能可能是不利的。
(5) The oxide film produced by welding may be detrimental to the pitting corrosion resistance of the alloy in the strong chloride solution.
(6)鈍化處（chù）理（lǐ）的主要作（zuò）用是溶解無縫方管（guǎn）表麵的夾雜物和（hé）沾染（rǎn）物，使之（zhī）潔淨，它（tā）還可去掉表麵的硫（liú）化錳夾雜，這種夾雜可能（néng）成為點腐蝕的萌生源（yuán）、從而改善無縫方管（guǎn）的抗點腐蝕（shí）性能。需要注意的是，無縫方管在鈍化處（chù）理後應用氫氧化鈉溶液清洗
(6) The main function of passivation treatment is to dissolve the inclusions and contaminants on the surface of seamless square tubes and make them clean. It can also remove the manganese sulfide inclusions on the surface. Such inclusions may become the origin of pitting corrosion and thus improve the pitting corrosion resistance of seamless square tubes. It should be noted that seamless square tubes are cleaned with sodium hydroxide solution after passivation treatment.
