文章信息/Info

Title:

Influence of Residuals on the Corrosion Resistance of Cold Rolling Sheets

作者:

方百友1; 楊敏娜2; 賀澤邦2; 盧琳2

（1.寶鋼新日鐵汽車板有限公司，上海 200941）
(2.北京科技大學(xué) 腐蝕與防護(hù)中心，北京100083）

Author(s):

FANG Baiyou1;  YANG Minna2; HE Zebang2;  LU Lin2

（1.Baosteel�睳SC Automotive Steel Sheets Co., Ltd., Shanghai 200941, China）
(2.Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China

關(guān)鍵詞:

冷軋板; 殘留物; 電化學(xué)腐蝕; 工間防銹; 存儲(chǔ)環(huán)境

DOI:

10.7502/j.issn.1674-3962.2016.05.11

文獻(xiàn)標(biāo)志碼:

A

摘要:

為了研究軋制過程中冷軋汽車板表面殘留物的影響因素，及其對(duì)鋼板表面耐蝕性能的影響，運(yùn)用掃描電化學(xué)極化曲線對(duì)不同表面狀態(tài)冷板的腐蝕行為進(jìn)行了對(duì)比研究，并運(yùn)用室內(nèi)模擬腐蝕實(shí)驗(yàn)對(duì)鋼板不同位置的工間防銹性能進(jìn)行了評(píng)價(jià)。結(jié)果表明鋼板表面殘油量越多，殘鐵量越少，其表面腐蝕電流密度越小，耐蝕性能越好，這與殘油所具有的物理屏蔽作用有關(guān)。與軋制參數(shù)差異帶來的影響相比，軋制油的種類是影響鋼板表面殘留物的關(guān)鍵因素，進(jìn)而影響鋼板的防銹性能。工間防銹實(shí)驗(yàn)結(jié)果表明，鋼板表面不同位置存在明顯的電化學(xué)狀態(tài)不均勻性，但所有位置試樣在存儲(chǔ)期的前3天內(nèi)均可保持較好的耐蝕狀態(tài)。相對(duì)來說，中間位置試樣的平均銹蝕度最小，腐蝕電流密度最小，可見中間位置的殘油較多、分布較均勻，阻礙了銹蝕的發(fā)生。

Abstract:

The affecting factors of the residues remained on cold rolled steel sheets and their influence on the corrosion resistance of the sheet were investigated in this paper. The electrochemical behaviors of the sheets with different surface status were studied by potentiodynamic method, and the rust prevention performance of the sheet during the processing interval was evaluated by simulated corrosion test. The results showed that the sheet presents a better corrosion resistance with a smaller corrosion current density when more quantity of residue oil and less amount of residue iron were detected on its surface, which is related to the shielding effect of the rolling oil. Compared with the effect of rolling parameter, the type of rolling oil is the key factor to determine the retention of residues on the surface of sheets, which has a further influence on the rust prevention of sheets. In addition, an inhomogeneity of electrochemical status is manifested on the sheets collected from different surface locations, and the extent of corrosion for the sheet from mediate location is the smallest, which is in good agreement with the results of simulated corrosion test. Nevertheless, all sheets keep a relatively good corrosion resistance in three days.