**Preface**

The corrosion of materials leads to about 3 to 4% economic losses of GDP in an industrial nation and also significantly contributes to greenhouse emissions and climate change, as the production of materials is one of the largest greenhouse emitters. Corroded material replacement leads to increasing demands in materials production. Therefore, from economic and environmental points of view, it is highly necessary and important to enhance the corrosion and tribocorrosion resistance of materials. Since corrosion and tribocorrosion are surface- and subsurface-related material degradation phenomena, surface engineering and coating technologies are the most effective to tackle such problems. This reprint is a collection of the papers published in the Special Issue "Surface engineering & coatings technologies for corrosion and tribocorrosion resistance" in the Materials journal. The Special Issue aims to collate the latest developments in this technologically, economically, and environmentally important area. It provides a forum for researchers to share their original work or insight reviews in this field. This reprint contains an Editorial by the Guest Editor and 12 original research papers and reviews related to this topic contributed by researchers from around the globe. The editor acknowledges the contributions of all the authors and the Editorial team in making this Special Issue a success.

> **Yong Sun** *Editor*
