In order to analyse the wettability

为了分析不同样品的润湿性，通过在KrüssDSA 100中滴入1 ml蒸馏水进行接触角（CA）测试。对用1 mm金刚石糊机械抛光的样品进行CA测量。将带状样品安装在玻璃上，以抛光两侧，轮和气体表面。液滴形状分析软件用于根据样品表面水滴的阴影图像确定接触角。通过分析图像中的不同灰度来确定液滴的形状和与表面的接触线（基线）。为了确定基线，软件会计算亮度水平的二阶导数的根，以获得发生最大变化的点。液滴的形状符合二次切线法[30]。

为了分析不同样品的可温度，在Kröss DSA 100中，通过一滴1毫升的滴水进行了接触角（CA）测试。CA 测量是在用 1 mmdiamond 糊进行机械抛光的样品上进行的。丝带样品安装在玻璃上，以抛光两侧、车轮和气体表面。滴形分析软件用于从样品表面水滴的阴影图像确定接触角。确定与表面（基线）的滴的形状和接触线，分析图像中不同的灰色级别。为了确定基线，软件计算亮度级别第二位部分的根，以获取发生最大变化的点。掉落的形状采用两个切线方法 [30]。此方法与多项式函数 （eq. （1））拟合基线附近的放置轮廓，这是许多理论模拟的结果。

In order to analyse the wettability of the different samples,contact angle (CA) tests were carried out by means of a drop ofdistilled water of 1 ml in a Krüss DSA 100. The CA measurementswere carried out on samples mechanically polished with 1 mmdiamond paste. Ribbon samples were mounted on a glass to polishboth sides, the wheel and gas surfaces. The Drop Shape Analysissoftware was used to determine the contact angle from the shadowimage of the water drop on the sample's surface. The shape of thedrop and the contact line with the surface (baseline) were determined analysing the different grey levels in the image. To determine the baseline, the software calculates the roots of the secondderivative of the brightness levels to obtain the point where thegreatest variation occurs. The shape of the drop was fitted with thetwo tangents method [30]. This method fits the drop profile in theregion near the baseline with the polynomial function (eq. (1)),which is the result of numerous theoretical simulations.<br>