Corrosion resistance of the welded AISI 316L after various surface treatments

<span style="font-family: Times New Roman; font-size: small;"> </span><p style="margin: 0cm 0cm 10pt; text-align: justify;" class="MsoNormal"><span lang="EN-US" style="line-height: 115%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;; font-size: 12pt;">The main aim of this work is to monitor the surface treatment impact on the corrosion resistance of the welded stainless steel AISI 316L to local corrosion forms. The excellent corrosion resistance of austenitic stainless steel is caused by the existence of stable, thin and well adhering passive layer which quality is strongly influenced by welding. Therefore surface treatment of stainless steel is very important with regard to its local corrosion susceptibility Surfaces of welded stainless steel were treated by various mechanical methods (grinding, garnet blasting). Surface properties were studied by SEM, corrosion resistance was evaluated after exposition tests in chlorides environment using weight and metalographic analysis. The experimental outcomes confirmed that the mechanical finishing has a significant effect on the corrosion behavior of welded stainless steel AISI 316L.</span><span lang="EN-US" style="line-height: 115%; letter-spacing: 0.1pt; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;; font-size: 12pt; mso-ansi-language: EN-GB;"> </span><span lang="EN-US" style="line-height: 115%; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;; font-size: 12pt;"></span></p><span style="font-family: Times New Roman; font-size: small;"> </span

Evaluation of the Completeness and Timeliness of the Infant Pertussis Surveillance System in the Czech Republic in 2015, 2017 and 2019

The completeness and timeliness of the pertussis questionnaire-based enhanced surveillance system (ESS) among infants and reported pertussis data within the electronic nationwide notification system (NNS) in the years 2015, 2017 and 2019 were evaluated in a pilot study