本文選題：Ni-P鍍層 + 熱處理�。� 參考：《金屬熱處理》2017年02期

【摘要】：在20R鋼表面化學(xué)鍍Ni-P合金鍍層,結(jié)果表明:制備的鍍層表面平整致密無裂紋,P含量為10.72%,屬于高磷非晶鍍層。對鍍層熱處理后的結(jié)構(gòu)、表面形貌、結(jié)合強度等性能進行了測試分析,發(fā)現(xiàn)Ni-P鍍層經(jīng)200℃熱處理后仍保持非晶態(tài)結(jié)構(gòu)并且結(jié)合強度更好,升溫至300℃后開始析出Ni_3P相,鍍層轉(zhuǎn)化為混晶態(tài)結(jié)構(gòu)。采用電化學(xué)試驗方法研究經(jīng)200℃熱處理后Ni-P鍍層及常用鋼材20R、ND鋼和316L不銹鋼的耐蝕性,發(fā)現(xiàn)Ni-P鍍層相對于20R、ND鋼和316L不銹鋼在5%硫酸溶液中的自腐蝕電位更高,為-234 m V,自腐蝕電流密度更小,為3.8687×10~(-6)A·cm~(-2),電荷轉(zhuǎn)移電阻更大,為954.9Ω·cm~(-2),體現(xiàn)了更好的抗硫酸腐蝕性能;對四種材質(zhì)在60℃不同濃度硫酸溶液中進行實驗室均勻腐蝕試驗,它們的年腐蝕率排序為20R?ND?Ni-P316L。
[Abstract]:Electroless Ni-P alloy coating was deposited on 20R steel. The results show that the surface of the prepared coating is flat, compact and crack-free, and the content of P is 10.72, which belongs to the amorphous coating with high phosphorus content. The structure, surface morphology and bonding strength of Ni-P coating after heat treatment were tested and analyzed. It was found that Ni-P coating remained amorphous structure after heat treatment at 200 鈩，

本文編號：2001778