Assessing the cleanability of stainless steel surfaces - development of a testing method for starch and protein based soils.
Assessing the cleanability of stainless steel surfaces - development of a testing method for starch and protein based soils.
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评估不锈钢表面的清洁性 - 开发淀粉和蛋白质污垢的测试方法。
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
A. Schmid
中科院分区：
文献类型：
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作者：
C. Gerhards;A. Schmid
为了在标准化条件下测量不锈钢表面的可清洁性，建立了测试台。可以将三块不锈钢板（尺寸200 x 100 mm）固定在试验台上，并使用低压喷嘴的水射流喷射几分钟。预先用具有预定层厚度的淀粉或蛋白质膜污染板，并在40°C /50%RH下干燥数小时。在设定的时间通过移除印版和拍摄照片来确定清洁的进度。当使用淀粉基污物时，需要用碘/碘化钾溶液（卢戈溶液）染色。对于蛋白质污垢，用紫外线照射就足够了，不会染色。使用图像处理程序ImageJ，可以识别和量化清洁表面的面积。初步研究表明，该方法更适合于淀粉基土壤比蛋白膜。淀粉膜对不锈钢板具有高粘附性，并从表面逐渐冲洗。然而，蛋白质膜形成强粘性的土壤层，其以不可预测的方式在喷雾射流的区域中分解为斑块。这导致测量值的高度变化。我们的研究结果表明，对于所使用的测试污垢，合金（AISI 304 L / 316 L）和表面粗糙度（0.8 / 0.2微米）都不会对不锈钢表面的可清洁性产生显著影响。
To measure the cleanability of stainless steel surfaces under standardized conditions, a test stand was set up. Three stainless steel plates (size 200 x 100 mm) can be fixed to the test stand and sprayed with a water jet from a low-pressure nozzle for a period of several minutes. The plates were previously soiled with a starch or protein film with a pre-defined layer thickness and dried for several hours at 40°C / 50% RH. The progress of the cleaning is determined at set times by removing the plates and taking photographic pictures. When using starch-based soils a staining with a solution of iodine / potassium iodide (Lugol’s solution) is necessary. For proteinaceous soils an illumination with UV light is sufficient without staining. With the image processing program ImageJ, the area of the cleaned surface can be identified and quantified. Preliminary studies show that the method is suited better for starch-based soils than for protein films. A starch film has high adhesion to the stainless steel plate and is rinsed gradually from the surface. Protein films, however, form a strong cohesive soil layer which disintegrates in the region of the spray jet as plaques in an unpredictable way. This results in a high degree of variance of the values that were measured. Our findings indicate that for the test soils used, neither the alloy (AISI 304 L / 316 L) nor the roughness of the surface (0.8 / 0.2 microns) have a significant influence on the cleanability of stainless steel surfaces.