sheradizing

Japanese: sheradizing

...Due to the nature of the treatment, the coating becomes an alloy of the base metal and the metal being diffused. Diffusion coatings used industrially to impart corrosion resistance, wear resistance, heat resistance, etc. to the surface of carbon steel include chromizing, which is impregnated with chromium, aluminizing, which is impregnated with aluminum (the well-known registered trademark is calorizing), and sheradizing, which is impregnated with zinc. Other practical applications include siliconizing, which is impregnated with silicon, a nonmetal, and boronizing, which is impregnated with boron. ...

From [Tinplate]

…There are two methods for zinc plating on steel sheets: hot-dip galvanizing and electrogalvanizing. For shapes other than steel sheets, diffusion coating (called sheradizing for zinc) and thermal spraying are also used. Continuous electroplating is used to apply a thin zinc plating as part of a composite corrosion protection film. …

*Some of the terminology explanations that mention "sheradizing" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…処理の性質上，皮膜は素地金属と拡散する金属との合金となる。炭素鋼の表面に耐食性，耐摩耗性，耐熱性などを付与する目的で工業的に行われる拡散被覆としては，クロムを浸透させるクロマイジングchromizing，アルミニウムを浸透させるアルミナイジングaluminizing(登録商標としてはカロライジングcalorizingが有名)，亜鉛を浸透させるシェラダイジングsheradizingがある。このほか，非金属であるケイ素を浸透させるシリコナイジングsiliconizingや，ホウ素を浸透させるボロナイジングboronizingなども実用化されている。…