Zur Diffusion und Wechselwirkung von Wasserstoff in Spannstählen unterschiedlicher Wasserstoffanfälligkeit – Zusammenfassung experimenteller Werte und quantenchemischer Erkenntnisse

On the diffusion and interaction of hydrogen in prestressing steels of different sensitivity against hydrogen – summarized experimental data and quantumchemical results Investigation of the influence of hydrogen on prestressing steels used as building materials shows that material involved in practical damage by hydrogen-influence is characterized by a higher hydrogendiffusion coefficient already of the not tensioned material. Responsible for this is a specific influence of inner surfaces coming into existence by local material defects. Their metastable reaction with hydrogen may lead to local decohesion of the metallic bond and so cracks may be induced if the steel is tensioned.