The main causes of wear in plastic processing machines are abrasion, corrosion, and adhesion. The situation is exacerbated by increasingly complex formulations of the molding materials, as well as rising processing temperatures and throughput rates. Despite significant advancements in wear protection through metals and ceramics, this issue is unlikely to change in the foreseeable future. The new edition takes into account the changed requirements as well as the progress made over the past 15 years. In particular, aspects such as corrosion and surface technology have gained much greater importance. The involvement of authors from the industry ensures a practical presentation of the findings and experiences.