日本无码中出在钱,欧美一级成人网站,黄色毛片免费看片,五区六区久久久久,日韩美女永久网址在线观看

鋅鍍層在大氣條件下對低合金鋼管為陽極性鍍層，經彩色鈍化后，明顯地提高了鍍層的保護性能并改善了外觀。主要用于防止低合金鋼管的腐蝕，其鍍層價格低廉，耐腐蝕性能優良，應用量大面廣。鋅是兩性金屬,比較活潑,在干燥少雨的大氣中鋅的腐蝕速度較慢。
Under the atmospheric condition, the zinc coating is an anodic coating on the low alloy steel tube. After the color passivation, the protective property of the coating is improved obviously and the appearance is improved. The utility model is mainly used for preventing the corrosion of the low alloy steel pipe, and the coating has the advantages of low price, excellent corrosion resistance and wide application. Zinc is a amphoteric metal, relatively lively, in the dry, less rain atmosphere, zinc corrosion rate is slower.
在潮濕的工業大氣中它能與二氧化硫、二氧化碳、氧氣、水等發生電化學腐蝕作用，人們通常看到的鋅層表面的白霜就是鍍鋅層的腐蝕產物。鍍鋅層若與能揮發出某些腐蝕性有機氣體的有機材料相接觸時更將加速它的腐蝕。 鍍鋅層遭到腐蝕后不斷變薄,這不僅使鍍層外觀受到破壞,甚至失去對低合金鋼管基體的保護能力。若將鍍鋅層在一定組成的鉻酸溶液中進行鈍化處理,使鍍鋅層表面形成一層組織細密、抗蝕性較高的鉻酸鹽膜(即鈍化膜)后,則可顯著地提高鍍鋅層的抗腐蝕能力。

In the wet it can occur in industrial air and water etc. the role of electrochemical corrosion of sulfur dioxide, carbon dioxide, oxygen, corrosion products, people usually see the surface of the zinc layer of frost is galvanized layer. Zinc coating will accelerate its corrosion if it contacts with organic material which can produce some corrosive organic gas. The zinc coating is thinned after corrosion, which not only destroys the appearance of the coating, but also loses the protection ability of the low alloy steel tube matrix. If the galvanized passivation solution in chromic acid composition, so as to form a layer of chromate film fine microstructure and corrosion resistance, high galvanized layer surface (i.e. passivation film), can significantly improve the corrosion resistance of the galvanized layer.
低合金鋼管經冷加工塑性變形可以提高其強度。在低合金鋼管中能形成穩定化合物的合金元素，在一定條件下，使之生成的第二相化合物從固溶體中沉淀析出，彌散地分布在組織中，從而有效地提高材料的強度，通常析出的合金化合物是碳化物相。
Low alloy steel tube can increase its strength by cold working and plastic deformation. Alloy elements can form stable compounds in low alloy steel pipe, under certain conditions, the formation of the second phase from the solid solution and precipitation of dispersed in the organization, so as to effectively improve the strength of materials, alloy compounds usually precipitated carbide phase.
我們會用優良的、貼切的服務，讓顧客感受到親情般的溫暖，始終視顧客的安全如己如親。我們會用自然優勢打造產品的獨特之處，從而給消費者帶來享用產品時獨特的心境。
We will use good, appropriate service, so that customers feel the warmth of family ties, always depending on the safety of customers, such as ourselves. We will use our natural advantage to create a unique product that will give consumers a unique mood to enjoy the product.