非接触极化曲线法实验研究的一些结果

SOME CONCLUSIONS DRAWN FROM THEEXPERIMENTAL AND THEORETICAL STUDY OFTHE NON-CONTACT POLARIZATION CURVE METHOD

本文讨论了利用非接触极化曲线法进行物探异常源评价的可行性。阐明和比较了接触极化曲线法和非接触极化曲线法的异同,并给出了黄铜、石墨及天然硫化矿石标本分别在自来水中和在0.01M的CuSO_4溶掖中实验测得的(视)阴极、阳极反应电位。(视)阴极、阳极极化曲线的差异以及某些反应段的极限电流密度。在利用反应电位,极差优势进行极化标本的识别和用极限电流密度推算反应物浓度以及利用视反应电位反演求取真反应电位等方面作了一些尝试．得出了许多有意义的结论。

This paper, on the basis of electrochemical theories and various experimentally obtained results, presents a detailed study of the feasibility of applying a Non contact Po larization Curve Method (NPCM)to discriminating and evaluating geophysical anumaly sources.It draws upon the Contact Polarization Curve Method (CPCM)and clucidates similarities and differences betweev NPCM and CPCM. Meanwhile, this paper also re ports the values of many pseudo cathodic and pseudo-anodic reaction potentials observed in experiments which were done on a brass block, a graphite block, and several sulphide ore samples when each dipped in water and CuSO'4s aqueous solution respectively. The limit-ing current densities corresponding to some certain reaction stages and the differences be-tween the anodic polarization curves and cathodic polarization curves are also discussed in this paper. Tests were carried out to determine the feasibility of applying reaction poten-tials and polarization superiori ties in discriminating certain polarizable samples, and limit-ing current densi ties in determining the reagents concentrations. From this several signiti-cant conclusions have been drawn. Experimental results and theoretical analyses both indi-cate that, although NPCM possesses numerous advantages, it is far more complicated than CPCM. Many difficulties remain to be overcome before the application of NPCM is as ef-fective as that of CPCM.