NEUTRAL TINNING BATH

Japanese Patent JP3902829

B2

PROBLEM TO BE SOLVED: To obtain a neutral electrolytic tinning bath capable of enhancing the efficiency of dissolution of a metal from an anode and keeping the concn. of the metal constant at the time of tinning work by using a carboxylic acid or its alkali metallic salt or ammonium salt as a complexing agent and imparting a specified pH.
SOLUTION: This neutral electrolytic tinning bath contains a compd. represented by the formula [where each of R1-R3 is H, lower alkyl or -(CH2)nCOOH (1≤n≤3)], preferably glycine as a complexing agent. The complexing agent has both action to dissolve an anode and action to stably disperse dissolved metallic ions at the time plating. Since a tin anode is dissolved by the complexing agent and tin ions can be held in the tinning bath without causing precipitation, the concn. of tin ions in the bath can be kept practically constant at the time of tinning work. When the bath is used at pH 4-8, the efficiency of dissolution of the anode and the efficiency of deposition on the cathode are enhanced.

JPH11152594	TIN AND TIN ALLOY PLATING BATH AND PREPARATION OF THE SAME
JP7243002	Tin plating solution and tin alloy plating solution
JPS55122892	PLATING BATH FOR TIN* TINNLEAD ALLOY

Takeshi Miura
Yasuo Ota
Motoya Shimazu

JP10297297A

April 11, 2007

April 21, 1997

Click for automatic bibliography generation  

Japan Rironal Co., Ltd.

C25D3/32; (IPC1-7): C25D3/32

JP5171489A
JP5044074A
JP6122991A
JP4048096A
JP54069534A
JP55122892A

Minoru Kondo
Minoru Senda
Koji Hashimoto

Previous Patent: CONNECTING METHOD FOR UNDERWATER STRUCTURE AND SHIELD TUNNEL

Next Patent: POLISHING DEVICE FOR SUBSTRATE