摘要
采用高压下的静态挂片实验、腐蚀电位测定和电化学阻抗谱测定研究了静水压力及其交替变化对高强度船体结构钢10CrNi3MoV在3.5%(质量分数)NaCl溶液中腐蚀行为的影响。结果表明:随着静水压力增大,溶液中溶解氧浓度降低,腐蚀产物中Fe_2O_3减少,腐蚀电位变负,从而使10CrNi3MoV钢的腐蚀速率明显减小。在交变静水压力条件下,由于压力交变引起了腐蚀产物与金属间的相互作用及锈层结构的变化而促进了金属的腐蚀,且静水压力越大对腐蚀的促进作用越大。在4MPa至常压静水压力交变下,10CrNi3MoV钢的腐蚀速率约为常压时的3.5倍。
The effect of hydrostatic pressure and its alternative variation on the corrosion behavior of 10CrNi3MoV steel in 3.5%（mass fraction）NaCI solution was studied by means of high-pressure static immersion test, potential measurement and electrochemical impedance spectra （EIS）. The results show that the dissolved oxygen of solution and the ratio of Fe203 in the corrosion products all decrease with the enhancement of hydrostatic pressure, which result in the decline of corrosion potential and the decrease of corrosion rate. Alternative hydrostatic pressures led to the changes of the interaction between corro- sion products and the steel, and the rust structures, which then enhanced the corrosion rate as a result, the corrosion rate increased with the increasing hydrostatic pressure. Under the specific conditions in this paper, the corrosion rate of 10CrNi3MoV steel in 3.5% NaCI solution under alternative hydrostatic pres- sures between atmospheric pressure and 4 MPa is 3.5 times of that under atmospheric pressure.
出处
《中国腐蚀与防护学报》
CAS
CSCD
北大核心
2017年第2期183-188,共6页
Journal of Chinese Society For Corrosion and Protection
关键词
静水压力
压力交变
腐蚀产物
电化学阻抗谱
hydrostatic pressure, alternation of pressure, corrosion product, electrochemical impedance spectra
