冶金教程3表面處理-資料下載頁

　　

【正文】 of deposition are spoken about Deep Galvanization (immersion of the manufactured article in a bath of fused zinc) and of Electrolytic Galvanization (immersion in a electrolytic bath and deposition of the zinc by means of passage of current electric)。 in this case the high strength steels must be subjected to dehydrogenation heat treatment. 根據所說及的深層鍍鋅 (將機器制成成品浸入有溶化鋅的池中 )及其電解鍍鋅 (沉浸在電解池，通入電流，產生鋅沉積物 )的沉積物 的工藝，在這種情形下，要獲取高強度的鋼就要通過脫氫熱處理 。 In the applications of our interest is preponderant the use of the electrolytic galvanization with film of zinc with thickness from 7 to 15 microns, followed by passivation of the zinc in way to increase the resistance to the atmospheric oxidation. 基于工業上的效益考慮，較常用的是厚度為 715微米的電鍍鋅膜，隨后是鋅的鈍化，以此來增強抗氧化性。 29/05/2022 34/41 Zinc Plating and Dacromet 鍍鋅與 達可羅 An evolution of the process of galvanization is the Dacromet that consists of the superficial deposition of metallic zinc through an anic varnish. 鍍鋅工序的發展稱為 。 The treatment has performed for immersion follows from centrifugal (at the end of remove the excess of varnish) and following passivation. 此處理是將料件沉浸與離心 (最終去除過多的清漆 )，然后鈍化。 The treatment of dacromet is more expensive than the galvanization but in remuneration do not require dehydrogenation and it allows of double the times of resistance in salt spray test. Dacromet處理比鍍鋅昂貴但是其好處是不再需要進行脫氫且可以在鹽霧 試驗中耐腐蝕時間 增加一倍 For the galvanization that for the dacromet the passivation happens by immersion of the pieces in baths of salts of chromic ions, extremely dangerous for whom he performs the treatments and on the way of have set outlaw. 鈍化工序就是將料件浸入在有鉻離子的鹽池中。如果沒有按要求操作的話，操作員會處于很危險境況中。 29/05/2022 35/41 Chrome plating 鍍鉻 The Chrome Platings are treatment used for confer or a better wear resistance (Hard Chrome Plating) or a better appearance to metallic manufactured items (Decorative Chrome Plating). 鍍鉻處理會賦予或增強耐磨性能 (硬的鍍鉻 )，或者還會使金屬加工物外觀更佳。 (裝飾性的鍍鉻 ) Sometime the difference is only theoretical because in each circumstance even the ornamental plating is posed by more thin layers of hard material (Nickel) below a “flash” of chrome and it has a function of wear resistance however. 其實，有時候以上的所描述的區別只是理論上的而已。因為在各種環境下即使是裝飾性的鍍層 , 在鉻飛邊 /批峰下的，亦有很多的薄的硬材料 (鎳 ), 而它同樣具有耐磨性能 In any particularly serious applications (high wear resistance) and in which there is not interest or for the appearance or the corrosion resistance are used “thic” layers of only chome above an anchorage of copper. 在要求較特殊或嚴格時 (高耐磨性 )，或不考慮成本時，或為了外觀因素，或考慮到抗腐蝕要求時，所用的處理方式是在銅上面鍍上厚鉻層。 29/05/2022 36/41 Chrome Plating 鍍鉻 x 500 Hard Chrome Plating on rocker arms of 500 cc 4 Strokes 4 Valves engine 500 cc 的 4沖程 4閥的發動機上的硬鍍鉻層 Only layer of columnar chrome with thickness of 5060 micrometers 厚度為 5060 micrometers 唯一的柱形鉻層 29/05/2022 37/41 Chrome Plating 鍍鉻 X 500 Ornamental chrome plating裝飾性鍍鉻 Two layers of hard Nickel (opaque + skinny) and a “flash” of chrome (not visible into microphotograph) 兩層硬鎳 (不透明 +膜狀 )和鉻“飛邊 /批峰” (在縮影照片中看不見 ) 29/05/2022 38/41 Chrome Plating鍍鉻 X 500 High Decorative Chrome Plating 極具裝飾性的鍍鉻 Double layer of opaque nickel with interposed a layer of copper, underlying to a layer of skinny nickel, more the usual flash of chrome. 雙層的 鎳，穿插一層銅，下面是一層膜狀的鎳， 表面是更光亮的鉻層 .