





摘 要:該文對(duì)電鍍玫瑰金拉絲不銹鋼制品倉(cāng)儲(chǔ)腐蝕機(jī)理進(jìn)行研究分析。結(jié)果表明,電鍍玫瑰金拉絲不銹鋼制品腐蝕原因是拉絲后不銹鋼制品表面的富鉻氧化膜致密性被破壞;裂紋縫隙的存在,使得水汽和空氣(含有氧氣)可藏于裂紋縫隙內(nèi),為不銹鋼的縫隙腐蝕提供良好的基礎(chǔ),從而加速電鍍玫瑰金拉絲不銹鋼制品腐蝕生銹。
關(guān)鍵詞:不銹鋼;電鍍;玫瑰金;腐蝕;表面形貌;機(jī)理
中圖分類(lèi)號(hào):TG142.71 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):2095-2945(2024)27-0093-04
Abstract: In this paper, the storage corrosion mechanism of electroplated rose gold brushed stainless steel products was studied and analyzed. The results show that the corrosion of electroplated rose gold drawing stainless steel products is caused by the destruction of the compactness of chromium-rich oxide film on stainless steel products surface after drawing, and the existence of cracks makes water vapor and air (containing oxygen) hidden in the cracks, which provides a good basis for the crevice corrosion of stainless steel, so as to accelerate electroplated rose gold brushed stainless steel products corrosion and rust.
Keywords: stainless steel; electroplating; rose gold; corrosion; surface morphology; mechanism
不銹鋼(Stainless Steel)是不銹耐酸鋼的簡(jiǎn)稱,耐空氣、蒸汽、水等弱腐蝕介質(zhì)或具有不銹性的鋼種稱為不銹鋼;不銹鋼是指在特定條件下不發(fā)生腐蝕的鋼,而不是鋼如其名,在所有環(huán)境下不發(fā)生腐蝕——不銹[1]。不銹鋼“不銹”的原理(關(guān)鍵因素)在于其表面具有一層自愈性的保護(hù)性氧化膜氧化鉻(Cr2O3)(它不像選擇性氧化而形成的那些保護(hù)性薄膜),致使不銹鋼能夠進(jìn)行常規(guī)加工而不失去抗氧化性——不銹性[2]。不銹鋼中必須含有足夠量的鉻(Cr)以形成基本上由Cr2O3組成的自愈性保護(hù)性氧化膜,以便當(dāng)薄膜弄破時(shí)有足夠數(shù)目的鉻陽(yáng)離子(Cr3+)重新形成薄膜。如果鉻(Cr)的比例低于完全保護(hù)所需要的比例,鉻(Cr)就溶解在基材表面形成的氧化物中而無(wú)法形成有效的保護(hù)膜。起完全保護(hù)作用所需的鉻(Cr)的比例取決于使用條件。在水溶液中,需要12%的鉻(Cr)產(chǎn)生自鈍化作用形成包含大量氧化鉻(Cr2O3)的保護(hù)膜。在氣態(tài)氧化條件下,低于1 000 ℃時(shí),12%的鉻(Cr)有很好的抗氧化性,在高于1 000 ℃時(shí),17%的鉻(Cr)也有很好的抗氧化性?!?br>