中文字幕日韩人妻视频一区,99国产精品视频免费,久久热视频免费在线观看,日本高清二区不卡,91午夜激情视频在线看,国产综合一区二区三区av,成人久久久国产精品成人,日韩欧美素人丝袜视频,国产色av综合在线

　　Black iron and white iron literally mean black iron and iron. Jinan black and white iron processing is a small workshop, mainly processing ordinary iron and galvanized iron plate and other things. They call ordinary iron "black iron" and galvanized iron (commonly known as snowflake iron), "white iron".

　　黑鐵又稱不銹鋼，是濟(jì)南一種黑白相間的鐵。不銹鋼的原色是黑色的，我們看到銀不銹鋼是經(jīng)過加工拋光的。對于不銹鋼，我們稱之為黑鐵。不銹鋼的耐腐蝕性能隨著含碳量的增加而不斷降低，因此，大多數(shù)不銹鋼含碳量較低，大不超過1.2%，而有些鋼的Wc(含碳量)會低于0.03%(如00Cr12)。不銹鋼中的主要合金元素是鉻(鉻)，只要鉻的含量達(dá)到一定的值，鋼就具有耐腐蝕的功能。因此，不銹鋼的普通鉻含量至少為10.5%。濟(jì)南黑白鑄鐵加工

　　Black iron, also known as stainless steel, is a kind of black and white iron in Jinan. The primary color of stainless steel is black. We can see that silver stainless steel is polished by processing. For stainless steel, we call it black iron. The corrosion resistance of stainless steel decreases with the increase of carbon content. Therefore, the carbon content of most stainless steels is low, up to 1.2%, while Wc (carbon content) of some steels is lower than 0.03% (for example, 00Cr12). The main alloying element in stainless steel is chromium (chromium). As long as the chromium content reaches a certain value, the steel has the function of corrosion resistance. Therefore, the common chromium content of stainless steel is at least 10.5%. Processing of Black and White Cast Iron in Jinan

　　鍍鋅鐵皮俗稱鍍鋅鐵皮。將干凈的鐵片浸在濃縮的液態(tài)鋅中制成。相比之下，鋅確實(shí)是活潑的，但在富含CO2的潮濕空氣中，可以形成一層堿性碳酸鋅:4Zn+2O2+3H2O+CO2→ZnCO3。3Zn(OH)2這層堿性碳酸鋅膜比較致密，也可作為維護(hù)膜使用，避免了鋅的內(nèi)部不再繼續(xù)氧化。

　　Galvanized iron sheet is commonly known as galvanized iron sheet. Clean iron sheets are dipped in concentrated liquid zinc. In contrast, zinc is indeed active, but in the humid air rich in CO2, a layer of alkaline zinc carbonate can be formed: 4Zn+2O2+3H2O+CO2_ZnCO3. The alkaline zinc carbonate film 3Zn (OH) 2 is compact and can be used as a maintenance film to avoid the internal oxidation of zinc.

　　假設(shè)一旦破壞鍍鋅層在未來,攻擊電化學(xué)腐蝕,因?yàn)殇\比鐵更生動,將鋅原電池消極攻擊氧化反應(yīng)和遭受損失,鐵被維護(hù)和馬口鐵相反,馬口鐵攻擊電化學(xué)腐蝕,因?yàn)殍F比錫更加生動,鐵是保持在里面。但是假設(shè)錫層被固定在一起，因?yàn)樗窃姵氐年枠O，錫會使鐵腐蝕得更快。

　　Assuming that once the galvanized layer is destroyed in the future, attack electrochemical corrosion, because zinc is more vivid than iron, it will passively attack oxidation reaction and suffer losses of galvanized primary batteries. Iron is maintained and, contrary to tinplate, tinplate attacks electrochemical corrosion, because iron is more vivid than tin, and iron is maintained inside. But assuming that the tin layer is fixed together, because it is the anode of the primary battery, tin will cause iron to corrode faster.

　　鍍鋅鐵特點(diǎn):鍍鋅鐵表面不易生銹。俗稱鉛鐵、錫鐵。為什么這么難生銹?這是維修的效果層表面的鐵,這與假設(shè)涂層受損,還可以形成一個鐵鋅原電池,作為陽極,鐵和鐵所維護(hù)的專用陽極的陰極維護(hù)原則。

　　Characteristics of galvanized iron: The surface of galvanized iron is not easy to rust. Commonly known as lead iron, tin iron. Why is it so difficult to rust? This is the iron on the surface of the repair effect layer, which is related to the assumption that the coating is damaged, and can also form an iron-zinc galvanic cell as the cathode maintenance principle of the special anode maintained by the anode, iron and iron.