- 學位論文
檸檬酸型混合電解液對SUS 304不銹鋼電漿拋光表面性質研究
Study on the Surface Properties of SUS 304 Stainless Steel Using Plasma Polishing with citric Acid based Mixed electrolyte
摘要
傳統的 SUS 304不銹鋼的電解拋光廣泛用硫酸 (H2SO4) 和磷酸 (H3PO4) 等毒害較大的酸性物質做混合電解液，但由於環保和安全問題，迫切需要開發更環保的電解液。在本文研究中，使用草酸和檸檬酸的混合電解液，這兩種酸類皆為有機酸，對環境的污染較小，通過電漿電解拋光對 SUS 304 不銹鋼板進行電解拋光，這是一種環保電解液。實驗分為三階段進行，尋找最佳參數組合。 第一階段：首先以電解質液濃度作為主要調整，草酸和檸檬酸的濃度分別為0.5 M、0.3M及0.1M。體積混合比例作為輔助調整，分別調整為5:1、5:2、5:3、5:4和5:5。電漿功率約為1.3 kW，電解時間為5分鐘，對SUS 304 不銹鋼進行電漿電解拋光處理。 第二階段：從以上結果得知，電解液濃度0.1 M，以草酸為基準，當草酸和檸檬酸的混合比為5:1時，可以獲得較好的表面粗糙度值，如果使用電解液濃度0.1M，並且電解拋光時間減少是否會改善拋光效果，所以將電解拋光時間調整為 1分鐘，等離子功率約為1.3 kW，對SUS 304 不銹鋼進行電漿電解拋光處理。 第三階段：經過0.3M和0.1M的數據比較結果得知，電解液濃度的下降，確實對表面粗糙度有下降的影響。所以，進一步將草酸和檸檬酸的電解質濃度分別改為0.05 M、0.01M，以電解拋光時間為 1分鐘，電漿功率約為1.3 kW，對SUS 304 不銹鋼進行電漿電解拋光處理。 從實驗結果得知，當電解質溶液濃度為0.1 M，電漿拋光加工時間為1分鐘時，可以得到較好的表面粗糙度。
並列摘要
The traditional electropolishing of SUS 304 stainless steel widely uses sulfuric acid (H2SO4) and phosphoric acid (H3PO4) as the mixed electrolyte, but due to environmental protection and safety issues, it is urgent to develop a more environmentally friendly electrolyte. In this study, a mixed electrolyte of oxalic acid and citric acid is used, both of which are organic acids, and the pollution to the environment is small. The experiment is carried out in three stages to find the best parameter combination. The first stage: First, the concentration of the electrolyte solution was used as the main adjustment, and the concentrations of oxalic acid and citric acid were 0.5 M, 0.3 M and 0.1 M, respectively. The volume mixing ratio is used as an auxiliary adjustment to adjust to 5:1, 5:2, 5:3, 5:4 and 5:5, respectively. Plasma power was about 1.3 kW, electrolysis time was 5 minutes, and SUS 304 stainless steel was subjected to plasma electrolytic polishing treatment. The second stage: From the above results, it is known that the electrolyte concentration is 0.1 M, based on oxalic acid. When the mixing ratio of oxalic acid and citric acid is 5:1, a better surface roughness value can be obtained. If the electrolyte concentration is used 0.1M, and whether the reduction of the electrolytic polishing time will improve the polishing effect, the electrolytic polishing time is adjusted to 1 minute, the plasma power is about 1.3 kW, and the SUS 304 stainless steel is subjected to plasma electrolytic polishing treatment. The third stage: After comparing the data of 0.3M and 0.1M, it is known that the decrease of the electrolyte concentration does have an effect on the surface roughness, so we further changed the electrolyte concentrations of oxalic acid and citric acid to 0.05 M, 0.01M, the electropolishing time is 1 minute, the plasma power is about 1.3 kW, and the SUS 304 stainless steel is plasma electropolished. From the experimental results, when the electrolyte solution concentration is 0.1 M and the plasma polishing processing time is 1 minute, better surface roughness can be obtained.
參考文獻
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