- 學位論文
熱浸鍍鋅鋼鍍鋅層結晶構造對抗蝕性之影響
Effects of Crystalline Structure of Zine Coating on Hot-Dip Steel to the Corrosion Resistance
摘要
本研究乃針對熱浸鍍鋅鋼板在不同的鋅結晶型態下腐蝕狀態的探討，以期了解鋅結晶型態對鋼板抗腐蝕能力之影響。藉由不同的廠商所生產的熱浸鍍鋅鋼板實驗分析其內部組成成分與結構，進一步對照比較兩者腐蝕狀態的差異性，找出結晶型態與腐蝕速率的相關性。實驗先建立碳鋼、不?袗?、CIN鍍鋅鋼、KGB鍍鋅鋼四組不同類型鋼板，依照不同的時間經過鹽霧試驗後觀察其變化。 研究結果比較四組腐蝕速率的變化可以發現碳鋼腐蝕速率最大，之後依序為KGB鍍鋅鋼、CIN鍍鋅鋼、不鏽鋼。針對鍍鋅鋼板分析比較後發現CIN鍍鋅鋼的鋅結晶型態以(2 1)方向的結晶為主， KGB鍍鋅鋼的鋅結晶型態以(0002)方向的結晶為主，經過SolidWork軟體模擬發現KGB結晶方向比CIN結晶方向排列緊密，鹽霧實驗結果卻是CIN結晶方向抗腐蝕能力較KGB結晶方向佳，進一步觀察鍍鋅層表面發現CIN鋅層表面是由較細緻之立方晶所組成，而KGB鋅層表面則為片狀晶所構成，因為立方晶接觸空氣表面較片狀晶小與空氣反應相對較慢，所以CIN鍍鋅鋼抗蝕能力優於KGB鍍鋅鋼。由研究結果可知不同鋅結晶方向造成不同的鍍層表面型態對抗腐蝕能力會有其顯著之影響。
並列摘要
This research is discussion that the hot dip galvanizing steel plate corrosion the state under different zinc crystallization, in the hope of finding out about the crystallization type influence on the anticorrosive ability of the hot dip galvanizing steel plate. Make use of heat produced by different manufacturers to soak its inside of experimental analysis of hot dip galvanizing steel plate and make up composition and structure, contrast and compare the difference that the two corrosion the state further, find out the crystallization type attitude and dependence of corrosion the speed . Set up carbon steel , stainless steel , zinc-plated steel of CIN , KGB zinc-plated four groups of different kinds of hot dip galvanizing steel plate first in experiment , observe its change after the salt fog is tested according to different time. The result of study can find that the carbon steel corrosion the speed biggest while comparing the change that four groups corrosion the speed , later it was zinc-plated steel of KGB , zinc-plated steel of CIN , stainless steel in order. Is it find CIN zinc-plated zinc crystallization type attitude of steel after comparing to analysis to hot dip galvanizing、steel plate with(2 1)The crystallization of the direction is a main fact, the zinc crystallization type attitude of the zinc-plated steel of KGB is as the main fact with the crystallization of the direction, find through the software simulation of solid works that KGB crystallization direction is closer than CIN crystallization direction is arranged , but the experimental result of salt fog is the anticorrosive ability of CIN crystallization direction relatively KGB crystallization direction is good, observe the galvanized layer surface and find one layer of surface of CIN zinc is made up brilliantly by more careful the cube further, one layer of surface of KGB zinc forms brilliantly for the slice, because the cube is exposed to the air surface brilliantly brilliant and smaller than the slice and the air is relatively slow in response, so the zinc-plated steel of CIN resists the ability of losing and is superior to the zinc-plated steel of KGB. After research we can know that different zinc crystallization directions cause different plating one layer of superficial attitudes and opposing and having its apparent influence to corrosion ability by the result of this study.