發(fā)布時間：2018-06-06 18:36

  本文選題：脈沖工藝 + 最佳工藝參數(shù)�。� 參考：《燕山大學》2015年碩士論文

【摘要】：近些年來,Ni-P鍍層有著耐腐蝕性好,硬度高,光亮度好的特點,被應(yīng)用到各個行業(yè),在航空行業(yè)以及微電子制造方面大受歡迎,電池鋼帶的鍍層也轉(zhuǎn)移到這個方向上來,所以如何生產(chǎn)出質(zhì)量優(yōu)異的合金鍍層,是人們備受關(guān)注的問題。目前,電池鋼帶為了獲得更好的鍍層,采用了脈沖電源,它有著降低濃差極化并且增大電化學極化的特點,所以,利用脈沖電源是改善鍍層質(zhì)量的一個新方向。本文采取脈沖電鍍的方法,在亞磷酸體系下,對低碳薄鋼板電鍍Ni-P合金。利用電化學方法對電池鋼帶的直流電鍍Ni-P鍍層、單脈沖電鍍Ni-P鍍層以及雙脈沖電鍍Ni-P鍍層做了耐腐蝕性的研究。分別用極化曲線表示出三種Ni-P鍍層在3.5%Na Cl溶液、1 mol/L H2SO4溶液和1 mol/L Na OH溶液中的耐腐蝕性,并用掃描電鏡對這些鍍層的表面做了分析,還采用了失重法對這些鍍片做了實驗,從極化曲線得到自腐蝕電流密度從小到大依次為:雙脈沖單脈沖直流電鍍;觀察表面形貌得知直流鍍片受到的腐蝕最嚴重,雙脈沖鍍片受到的腐蝕最小;根據(jù)失重法測量失重由大到小依次為:直流電鍍片、單脈沖電鍍片、雙脈沖電鍍片。三種鋼帶在酸堿鹽溶液中進行浸泡,都被腐蝕,在堿性溶液與中性溶液中是被小面積腐蝕的,而在酸性溶液中被大面積腐蝕,結(jié)果表明:在酸性溶液中鋼帶腐蝕的最嚴重。本實驗采取了三種方法得到三種電池鋼帶:直流電鍍Ni-P層、單脈沖電鍍Ni-P層以及雙脈沖電鍍Ni-P層。直流電鍍Ni-P層的最佳實驗參數(shù):平均電流密度為2.5A/dm2,反應(yīng)溫度為65℃,p H值取1.5-2.1時,電池鋼帶的耐腐蝕性最好;單脈沖電鍍Ni-P層的最佳實驗參數(shù):平均電流密度為2A/dm2,占空比為0.3,反應(yīng)溫度為65℃,p H值為2時電池鋼帶的耐腐蝕性最好;本實驗又采用了正交實驗法以及單因素法得到了雙脈沖電鍍優(yōu)于單脈沖和直流電鍍,最后得到雙脈沖最佳實驗參數(shù)是正向?qū)〞r間為15ms、正向關(guān)斷時間為85ms、正向工作時間為120ms、正向平均電流密度2A/dm2、反向?qū)〞r間10ms、反向關(guān)斷時間為15ms、反向平均電流密度0.025A/dm2、反向工作時間為30ms。
[Abstract]:In recent years, the Ni-P coating has the characteristics of good corrosion resistance, high hardness and good brightness. It has been applied to various industries. It is very popular in the aviation industry and microelectronics manufacturing. The coating of the battery steel strip has also been transferred to this direction. So how to produce high quality alloy coating is a problem that people pay more attention to. At present, in order to obtain better coating, the battery steel strip adopts pulse power supply, which has the characteristics of reducing the concentration polarization and increasing the electrochemical polarization. Therefore, the use of pulse power supply is a new direction to improve the quality of the coating. In this paper, Ni-P alloy was electroplated on low carbon thin steel plate by pulse electroplating in phosphorous acid system. The corrosion resistance of direct current Ni-P plating, single pulse Ni-P plating and double pulse Ni-P plating were studied by electrochemical method. The corrosion resistance of three kinds of Ni-P coatings in 3.5 NaCl solutions and 1 mol / L NaOH solution were obtained by polarization curves, respectively. The surface of these coatings was analyzed by scanning electron microscope, and the experiments were carried out by weightlessness method. From the polarization curve, the order of self-corrosion current density is as follows: double pulse monopulse DC electroplating, the observation of surface morphology shows that the corrosion of DC plating is the most serious, and the corrosion of double-pulse plating is the least. According to weightlessness measurement, the order of weightlessness is DC electroplating, monopulse electroplating and double pulse electroplating. Three kinds of steel strips were corroded in acid and alkali solution. They were corroded in alkaline solution and neutral solution, while in acid solution, they were corroded in large area. The results showed that the corrosion of steel strip was the most serious in acid solution. In this experiment, three kinds of battery strip were obtained by three methods: direct current plating Ni-P layer, monopulse electroplating Ni-P layer and double pulse electroplating Ni-P layer. The optimum experimental parameters of Ni-P coating are as follows: the corrosion resistance of battery steel strip is the best when the average current density is 2.5A / dm2, the reaction temperature is 65 鈩，

本文編號：1987721