Corrosion stability of electrochemically deposited Zn-Mn coatings
Authors: Riđošić Marija 
Published: December 2017

&lt;p&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;The topic of this paper is testing corrosion stability of electrodeposited Zn-Mn coatings by using electrochemical impedance spectroscopy (SEI). The coatings were deposited galvanostatically on a 3x3 cm steel. 99.99% pure zinc was used as the anode. The electrodeposition was carried out from four chloride solutions. Solution 1 was without manganese (3mol/dm&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; top: -0.5em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;3&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;&amp;nbsp;KCl, 0,42mol/dm&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; top: -0.5em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;3&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;&amp;nbsp;H&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; bottom: -0.25em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;3&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;BO&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; bottom: -0.25em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;3&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;, 0,45mol/dm&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; top: -0.5em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;3&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;&amp;nbsp;ZnCl ), solutions 2-4 had the same concentration of KCl,&amp;nbsp;H&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; bottom: -0.25em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;3&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;BO&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; bottom: -0.25em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;3&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;&amp;nbsp;and ZnCl&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; bottom: -0.25em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;2&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;&amp;nbsp;as in solution 1 and only MnCl&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; bottom: -0.25em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;2&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;&amp;middot;4H&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; bottom: -0.25em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;2&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;O was added in various concentrations. Final concentrations of solutions 2-4 were as follows: solution 2 - [Mn&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; top: -0.5em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;2+&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;]:[Zn&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; top: -0.5em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;2+&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;]=1:1 (0,45mol/dm&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; top: -0.5em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;3&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;&amp;nbsp;MnCl&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; bottom: -0.25em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;2&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;&amp;middot;4H&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; bottom: -0.25em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;2&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;O); solution 3-[Mn&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; top: -0.5em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;2+&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;]:[Zn&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; top: -0.5em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;2+&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;]=1:2 (0,225mol/dm&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; top: -0.5em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;3&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;&amp;nbsp;MnCl&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; bottom: -0.25em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;2&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;&amp;middot;4H&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; bottom: -0.25em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;2&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;O,); solution 4-[Mn&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; top: -0.5em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;2+&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;]:[Zn&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; top: -0.5em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;2+&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;]=2:1 (0,9mol/dm&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; top: -0.5em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;3&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;&amp;nbsp;MnCl&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; bottom: -0.25em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;2&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;&amp;middot;4H&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; bottom: -0.25em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;2&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;O). Zn-Mn coatings were electrodeposited on chemically prepared samples of steel (cathodes) for 15 minutes from all solutions at current densities of 1 А/dm&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; top: -0.5em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;2&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;&amp;nbsp;, 2 А/dm&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; top: -0.5em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;2&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;&amp;nbsp;and 4 А/dm&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; top: -0.5em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;2&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;&amp;nbsp;. The obtained results showed that the Zn-Mn coatings deposited at all current densities have a higher corrosion stability compared to the pure zinc coating. For examle, of all the coatings deposited at the current density of 1A/dm&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; top: -0.5em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;2&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;&amp;nbsp;the coating deposited from solution 2 had the greatest corrosion stability, whereas the coatings from solutions 3 and 4 were more corrosion resistant at the current density of 2 and 4A/dm&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; top: -0.5em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;2&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;&amp;nbsp;. Corrosion resistances, determined from the Nyquist diagrams (Zimag) of the pure Zn coatings, were in the range of 80-130 &amp;Omega;, depending on the deposition current density, while the resistances of the alloy coatings were around 150-200 &amp;Omega;. Based on results obtained by electrochemical impedance spectroscopy it can be concluded that the most resistant Zn-Mn coatings were deposited from the solution 3 ([Mn&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; top: -0.5em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;2+&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;]:[Zn2+]=1:2), at the current densities of 2 A/dm&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; top: -0.5em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;2&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;&amp;nbsp;and 4 A/dm&lt;/span&gt;&lt;span style=&quot;font-size: 10.5px; line-height: 0; position: relative; vertical-align: baseline; top: -0.5em; color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt;2&lt;/span&gt;&lt;span style=&quot;color: rgba(0, 0, 0, 0.87); font-family: &#039;Noto Sans&#039;, -apple-system, BlinkMacSystemFont, &#039;Segoe UI&#039;, Roboto, Oxygen-Sans, Ubuntu, Cantarell, &#039;Helvetica Neue&#039;, sans-serif;&quot;&gt; .&lt;/span&gt;&lt;/p&gt;