When welding electronics, specifically radio-frequency (RF) components, silver-based flux is often used, as silver reduces the risk of arcing and heats more evenly than other fluxes. For soldering to metal components, acid-core flux is best as it is able to effectively dissolve oxidation and improve soldering on metal surfaces.įor lead-free soldering, water-soluble flux is often recommended as it improves the lifespan and performance of lead-free parts.
Soldering flux substitute mac os#
the cyclohexylamine citrate is as the purposes of the additive in the solder flux composition.How To Fix Mac OS Bluetooth Connection Issuesįor high-temperature soldering, rosin flux is often used, as it is able to penetrate metal layers and create a strong bond.
Soldering flux substitute series#
DescriptionĪt present Printed circuit board industry all adopts cyclohexylamine hydrochloride and cyclohexylamine hydrobromide as helping the weldering additive basically But cyclohexylamine hydrochloride and cyclohexylamine hydrobromide all contain organic halogen Can serious harm arrive health and ecological environment, so various countries have formulated the industry standard of a series of Halogens/low halogen.Current " non-halogen " requires to come from mostly some industry standards, and " Halogen " requires only Br in the halogen and Cl to be claimed for two kinds in the present industrial quarters.For example NEC's circuit industry meeting (JPCA) International Electrotechnical Commission (IEC) International electronics industry connects definition and the standard that association (IPC) has successively confirmed " Halogen " Require the total amount of Br element in the printed circuit board (PCB) (PCB) must not surpass 900ppm Cl element total amount must not surpass 900ppm This standard was revised in 2003, had increased the new standard that two kinds of element total amounts of Br and Cl must not surpass 1500ppm.ġ0. The soldering flux composition containing the cyclohexane citrate has low cost, less environment pollution and enhanced soldering capacity. The cyclohexane citrate has the purity of above 99 percent and is prepared by the method comprising the following steps of: 1, taking citric acid, adding pure water, heating and dissolving completely, and then filtering and clarifying 2, slowly adding the filtered citric acid solution in the corresponding quantity of cyclohexane under the condition of stirring, reacting at a temperature of 60-90 DEG C, and finally adding the cyclohexane or citric acid to regulate pH to be 7.5-9 3, heating and concentrating until a crystal coating occurs, pouring a heat solution in a tray while heating for cooling to be in a block shape and 4, cutting the blocky cyclohexane citrate in the tray into small blocks, and drying at a temperature of 80-95 DEG C to obtain the soldering flux composition. The invention discloses a soldering flux composition containing cyclohexane citrate, and also discloses a method for preparing the cyclohexane citrate and an application of the cyclohexane citrate as an additive of the soldering flux.
Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Guangzhou chemical reagent factory filed Critical Guangzhou chemical reagent factory Priority to CN2011102309228A priority Critical patent/CN102303199B/en Publication of CN102303199A publication Critical patent/CN102303199A/en Application granted granted Critical Publication of CN102303199B publication Critical patent/CN102303199B/en Status Expired - Fee Related legal-status Critical Current Anticipated expiration legal-status Critical Links
Original Assignee Guangzhou chemical reagent factory Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) ( en Inventor 喻小琦 李帅 刘红梅 谷芳芳 Current Assignee (The listed assignees may be inaccurate.
Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Granted Application number CN 201110230922 Other languages Chinese ( zh) Google Patents CN102303199A - Soldering flux composition containing cyclohexane citrate CN102303199A - Soldering flux composition containing cyclohexane citrate
0 kommentar(er)
