Research On The High Efficient Inhibition Cleaning Agent Used On The Cobalt Alloy And Its Properties

Water-based metal cleaning agents are mainly composed of surface active agent andcorrosion inhibitor. The surface active agents have nonionic, anionic and amphoteric ionsurfactant, which are composed of two compounds of the hydrophobic and hydrophilicgroups. The water-based cleaning agents use the complex surfactant technology todevelop widely applicable range and decontamination capability. They are suitable formechanized automatic cleaning that can be widely used in metal processing industry.The research of cleaning agents about domestic and foreign literature oncobalt-base alloy precipitation problem is few. Through the screening out of suitablesurfactant, this article has prepared a new type of alkaline and neutral efficient cleaningagent, which can effectively inhibit cobalt ion precipitation of cobalt-base alloy. Thecleaning agent requires not only the high cleaning efficiency but also can better inhibitthe cobalt precipitation of cobalt-base alloy, so the formulation is also required to jointhe metal corrosion inhibitor. Firstly, this article use the orthogonal test method to drawup the formula, make full use of the solubility of the solution, the solute pH value andthe characteristics of surfactant additives. At the same time, it can have a variety offunctions of the cleaning agent beside the decontamination effect in order to enhanceand increase the cleaning ability, through the comparison’s CEF and surface corrosionmorphology of different cleaning formulations after cleaning. So it determines thecleaning agent composition and cleaning technology. Secondly in the corrosion inhibitorscreening test for good cleaning and corrosion inhibition effect of compound corrosioninhibitor, it can filter out to add optimum dosage of compound corrosion inhibitor intothe cleaning agent by changing the dosage, which can obviously inhibit the precipitationof cobalt ion on the surface of the sample. Finally using citric acid and sodium citratebuffer solution to regulate the cleaning agent of the pH value so that to ultimatelydetermine the cleaning formulations.The washing test of weak alkaline and neutral cleaning agent on artificial oil CEFis up to99.93%and99.74%, they can thoroughly remove greasy dirt from the metalsurface, which have achieved the ASTM G121-98and QB/T2117-95requirements. Thetest’s results of the cleaning agent corrosion evaluation show that the two kinds ofcleaning agent can not only reduce the corrosion area of cobalt base alloy, but alsoinhibit the precipitation of Co²⁺, so their corrosion effect are very well. Through thecontrast of the cleaning, immersion, salt spray, electrochemistry, SEM and energyspectrum test of the weakly alkaline, neutral, import and domestic cleaning agent on cobalt-based alloy. It has also showed that the developed cleaning agent’s corrosioneffect is better. They can better inhibit Co²⁺emission of cobalt base alloy, which solvethe cleaning agent cobalt precipitation problem. Therefore, this paper has developed twokinds of cleaning agent that the use is convenient, safe and environmental, whichconforms to the development direction of the new high performance cleaning agents.