| 第 52 卷第 3 期 |  | Vol. 52 No. 3 | | 2022 年 6 月 | Jun 2022 |
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所屬欄目：功能材料
非晶態(tài)鎳鎢合金的制備及腐蝕與防護研究 |
| 姜 燦1，余 暉1，蘇 卓1，蘇長(cháng)偉2，肖 鑫2
（1. 湖南安全生產(chǎn)科學(xué)研究有限公司，湖南 長(cháng)沙 410000；2.湖南工程學(xué)院 材料與化工學(xué)院，湖南 湘潭 411101） |
| 摘 要：基于檸檬酸體系獲得的鎳鎢合金鍍層具有優(yōu)異防腐性能，在油氣管道、采油設備上獲得了成功應用。采用電沉積技術(shù)在焦磷酸體系中制備了鎳鎢合金，通過(guò)提高電鍍液中鎢酸鈉的濃度，獲得了鎢含量達44.2%非晶態(tài)鎳鎢合金。3.5%NaCl溶液中利用極化曲線(xiàn)對該合金進(jìn)行了耐蝕性研究，相對Q235基體，鎳鎢合金的腐蝕電位正移112 mV，但腐蝕電流有所增加，通過(guò)熱處理進(jìn)一步降低腐蝕電位，同時(shí)也降低了腐蝕電流，500 ℃腐蝕電位正移257 mV，腐蝕電流為1.93 μA/cm2，只有Q235基體的1/3。熱處理對鎳鎢合金的相結構和硬度產(chǎn)生明顯影響，XRD數據表明隨著(zhù)熱處理溫度的提高鎳鎢合金從非晶到晶態(tài)轉變，顯微硬度逐步提高，最高達到1139.9 HV，700 ℃鎳鎢合金出現了氧化物的相，硬度下降。 |
| 關(guān)鍵詞：鎳鎢合金；耐蝕性；電沉積 |
| 中圖分類(lèi)號：X703 文獻標識碼：A 文章編號：1009-9212（2022）03-0072-05 |
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| Corrosion and Protection of Amorphous Nickel Tungsten Alloy |
| JIANG Can1, YU Hui1, SU Zuo1, SU Chang-wei2, XIAO Xin2
(1. Hunan Safety Science and Technology Co.,Ltd., Changsha 410000, China; 2. College of Materials and Chemical Engineering, Hunan Institute of Engineering, Xiangtan 411101, China) |
| Abstract：The nickel tungsten alloy coating obtained from citric acid system has excellent corrosion resistance and has been successfully applied in oil and gas pipelines and production equipment. In this work, nickel tungsten alloy was electrodeposited form pyrophosphoric system. By increasing the concentration of sodium tungstate in electroplating solution, the amorphous structure was obtained and the tungsten content of the nickel tungsten alloy reached 44.2%. The corrosion resistance of the alloy was studied by Tafel curves in 3.5% NaCl solution. Compared with the Q235 substrate, the corrosion potential of the Ni-W alloy was positively shifted by 112 mV, but the corrosion current increased. The corrosion potential was further reduced after heat treatment, and the corrosion current was also reduced. For example, the corrosion potential was positively shifted by 257 mV at 500 ℃, and the corrosion current was 1.93 μA/cm2, which was only 1/3 of the Q235 substrate. Heat treatment has a significant effect on the phase structure and hardness of Ni-W alloy. XRD data showed that with the increase of heat treatment temperature, Ni-W alloy changes from amorphous to crystalline structure and the microhardness gradually increases, up to 1139.9 HV. At 700 ℃, Ni-W alloy appears new oxide phase, and the hardness decreases. |
| Key words：nickel tungsten alloy; corrosion resistance; electrodeposition |
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作者簡(jiǎn)介：姜 燦（1986—），男，湖南寧鄉人，工程師，研究方向：腐蝕與防護（E-mail：524549762@qq.com）。
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收稿日期：2022-05-07
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